FEC-418 metadataProfileId support

#comment fixes support for metadataProfileId, including updated
documentation and test page.
Merge branch 'master' into FEC-418_metadataProfileId_support

Conflicts:
	modules/KalturaSupport/tests/CustomMetaData.html
Merge pull request #477 from kaltura/FEC-418_metadataProfileId_support

FEC-418 metadataProfileId support - merge to jsonConfig + master