PLA-99 changing used controller to PandoraForms
PLA-99 changes for making PandoraFormsController separately
PLA-99 use default value form config for set method only if value not given or null
PLA-99 small fix in controller
PLA-98 added child type to soundtrack field
Merge remote-tracking branch 'origin/VideoMetaData_MapperRefactor' into VideoMetaData_MapperRefactor

Conflicts:
	extensions/wikia/SDSVideoMetadata/mappings/VideoClipGamingVideo.class.php
PLA-100 form mapping changed due to config changes