PLAT-383 - add email notification template dispatched when a new caption asset is added to an entry with metadata field X equal to value Y
replace 'getObjectId' with 'getEntryId'
MetadataFieldChanged condition should be changed to accept asset objects as well
PLAT 383
Merge pull request #421 from kaltura/IX-9.5.0-PLAT-383

Ix 9.5.0 plat 383