System Tests Clean Up
Removing Selenium RC Tests for ACL
Removing Selenium RC Tests for Articles
Removing RC Tests for Com_users
Removing RC Tests for Control_panel
Removing RC Tests for Languages
Removing RC tests for Menus
Removing RC tests for Modules
Removing RC setup Files, with Few other Tests
Add a README to the unit test folder, restructure some of the files in the system
Merge branch 'staging' of github.com:joomla/joomla-cms into staging
Some modifications to JDatabaseDriverMysqlTest
Merge pull request #4691 from puneet0191/SYSTEM_TEST_CLEANUP

System Tests Cleanup
Merge remote-tracking branch 'origin/staging' into currentSystemTest