MDL-49329 admin: Introduce new \core\update\validator class

This is not really new class. Originally, the validator was implemented
in the scope of the tool_installaddon plugin. But we need its features
in other parts at the core level (e.g. during the upgrade to validate
available missing dependencies or available updates). Looking back, it
was a mistake to have it implemented at the plugin level rather than the
core level.

So this patch moves the tool_installaddon_validator class to
\core\update\validator class, together with associated unit tests,
fixture files and strings. There were changes made in the
tool_installaddon to make use of this new class instead of the old one.

This is a great step towards the bright future, hopefully there won't be
many regressions.

AMOS BEGIN
 MOV [validationmsg_componentmatch,tool_installaddon],[validationmsg_componentmatch,core_plugin]
 MOV [validationmsg_componentmismatchname,tool_installaddon],[validationmsg_componentmismatchname,core_plugin]
 MOV [validationmsg_componentmismatchname_help,tool_installaddon],[validationmsg_componentmismatchname_help,core_plugin]
 MOV [validationmsg_componentmismatchname_info,tool_installaddon],[validationmsg_componentmismatchname_info,core_plugin]
 MOV [validationmsg_componentmismatchtype,tool_installaddon],[validationmsg_componentmismatchtype,core_plugin]
 MOV [validationmsg_componentmismatchtype_info,tool_installaddon],[validationmsg_componentmismatchtype_info,core_plugin]
 MOV [validationmsg_filenotexists,tool_installaddon],[validationmsg_filenotexists,core_plugin]
 MOV [validationmsg_filesnumber,tool_installaddon],[validationmsg_filesnumber,core_plugin]
 MOV [validationmsg_filestatus,tool_installaddon],[validationmsg_filestatus,core_plugin]
 MOV [validationmsg_filestatus_info,tool_installaddon],[validationmsg_filestatus_info,core_plugin]
 MOV [validationmsg_foundlangfile,tool_installaddon],[validationmsg_foundlangfile,core_plugin]
 MOV [validationmsg_maturity,tool_installaddon],[validationmsg_maturity,core_plugin]
 MOV [validationmsg_maturity_help,tool_installaddon],[validationmsg_maturity_help,core_plugin]
 MOV [validationmsg_missingcomponent,tool_installaddon],[validationmsg_missingcomponent,core_plugin]
 MOV [validationmsg_missingcomponent_help,tool_installaddon],[validationmsg_missingcomponent_help,core_plugin]
 MOV [validationmsg_missingcomponent_link,tool_installaddon],[validationmsg_missingcomponent_link,core_plugin]
 MOV [validationmsg_missingexpectedlangenfile,tool_installaddon],[validationmsg_missingexpectedlangenfile,core_plugin]
 MOV [validationmsg_missingexpectedlangenfile_info,tool_installaddon],[validationmsg_missingexpectedlangenfile_info,core_plugin]
 MOV [validationmsg_missinglangenfile,tool_installaddon],[validationmsg_missinglangenfile,core_plugin]
 MOV [validationmsg_missinglangenfolder,tool_installaddon],[validationmsg_missinglangenfolder,core_plugin]
 MOV [validationmsg_missingversion,tool_installaddon],[validationmsg_missingversion,core_plugin]
 MOV [validationmsg_missingversionphp,tool_installaddon],[validationmsg_missingversionphp,core_plugin]
 MOV [validationmsg_multiplelangenfiles,tool_installaddon],[validationmsg_multiplelangenfiles,core_plugin]
 MOV [validationmsg_onedir,tool_installaddon],[validationmsg_onedir,core_plugin]
 MOV [validationmsg_onedir_help,tool_installaddon],[validationmsg_onedir_help,core_plugin]
 MOV [validationmsg_pathwritable,tool_installaddon],[validationmsg_pathwritable,core_plugin]
 MOV [validationmsg_pluginversion,tool_installaddon],[validationmsg_pluginversion,core_plugin]
 MOV [validationmsg_release,tool_installaddon],[validationmsg_release,core_plugin]
 MOV [validationmsg_requiresmoodle,tool_installaddon],[validationmsg_requiresmoodle,core_plugin]
 MOV [validationmsg_rootdir,tool_installaddon],[validationmsg_rootdir,core_plugin]
 MOV [validationmsg_rootdir_help,tool_installaddon],[validationmsg_rootdir_help,core_plugin]
 MOV [validationmsg_rootdirinvalid,tool_installaddon],[validationmsg_rootdirinvalid,core_plugin]
 MOV [validationmsg_rootdirinvalid_help,tool_installaddon],[validationmsg_rootdirinvalid_help,core_plugin]
 MOV [validationmsg_targetexists,tool_installaddon],[validationmsg_targetexists,core_plugin]
 MOV [validationmsg_targetexists_help,tool_installaddon],[validationmsg_targetexists_help,core_plugin]
 MOV [validationmsg_unknowntype,tool_installaddon],[validationmsg_unknowntype,core_plugin]
 MOV [validationmsg_versionphpsyntax,tool_installaddon],[validationmsg_versionphpsyntax,core_plugin]
 MOV [validationmsglevel_debug,tool_installaddon],[validationmsglevel_debug,core_plugin]
 MOV [validationmsglevel_error,tool_installaddon],[validationmsglevel_error,core_plugin]
 MOV [validationmsglevel_info,tool_installaddon],[validationmsglevel_info,core_plugin]
 MOV [validationmsglevel_warning,tool_installaddon],[validationmsglevel_warning,core_plugin]
AMOS END

lib/tests/update_code_manager_test.php

@@ -106,7 +106,7 @@ class core_update_code_manager_testcase extends advanced_testcase {
 
     public function test_unzip_plugin_file() {
         $codeman = new \core\update\testable_code_manager();
-        $zipfilepath = __DIR__.'/fixtures/invalidroot.zip';
+        $zipfilepath = __DIR__.'/fixtures/update_validator/zips/invalidroot.zip';
         $targetdir = make_request_directory();
 
         $files = $codeman->unzip_plugin_file($zipfilepath, $targetdir);
@@ -141,7 +141,7 @@ class core_update_code_manager_testcase extends advanced_testcase {
             }
         }
 
-        $zipfilepath = __DIR__.'/fixtures/bar.zip';
+        $zipfilepath = __DIR__.'/fixtures/update_validator/zips/bar.zip';
         $files = $codeman->unzip_plugin_file($zipfilepath, $targetdir, 'bar');
     }
 }