Moved the StaticContainer into `Piwik\Container`
Import the old INI configuration in the DI config
Merge branch 'master' into di-config

Conflicts:
	core/FrontController.php
started removing duplicate/old translations keys
fixed tests
fixes #6727 lazy load plugin settings
Fixes #6730 when period archiving fails (or any of segments fails) then we will make sure to re-process the data for this website in the next run
UI screenshot test
Merge branch 'master' into di-config
Refactoring System check which was six year old code
Merge pull request #6648 from piwik/di-config

Import INI config in DI config
Fixes #6468 Error in system check when always_populate_raw_post_data is not -1 on PHP 5.6+
Forgot to add refactored file.
Merge branch 'master' into processed_metrics_metadata

Conflicts:
	tests/PHPUnit/System/expected/test_TwoVisitors_twoWebsites_differentDays_scheduled_report_in_csv__ScheduledReports.generateReport_month.original.csv
	tests/PHPUnit/System/expected/test_TwoVisitors_twoWebsites_differentDays_scheduled_report_in_html_tables_only__ScheduledReports.generateReport_month.original.html
	tests/PHPUnit/System/expected/test_apiGetReportMetadata__API.getReportMetadata_day.xml
	tests/PHPUnit/System/expected/test_ecommerceOrderWithItems_scheduled_report_in_html_tables_only__ScheduledReports.generateReport_week.original.html
Fixing merge test failures.