Kaltura CE 12.1.0 released

kaltura-base changelog:

• PLAT-5105 - playManifest refactoring for live - delivery profile
• PLAT-5778 - On playManifest, When Captions are available add them automatically in the packager request
• PLAT-6024 - Live Delivery profile - enable overiding live delivery profiles per partner similar to how we work with VOD
• PLAT-5907 - Add live delivery profile configuration in admin console partner configure page
• SUP-8321 - Trimming VOD of a live entry results in two sources
• SUP-8905 - Cross Kaltura distribution failing intermittently
• SUP-8016 - replacing media to a VOD entry results with adding instead of replacing

kaltura-nginx changelog:

• RPM: nginx is now compiled with ffmpeg to support the vod-module's thumbnail creation and Playback rate change featues. This aligns it with its deb counterpart.

kaltura-html5lib changelog:

• Upgrade old UI confs to latest HTML5lib version

postinst scripts changelog:

• Use the kaltura-mediainfo package instead of mediainfo
• #567