as suggested by @tan-tan, prompt for calling kaltura-mysql-settings.sh in the event settings are incorrect and MySQL resides locally.
kaltura-libmcrypt rightfully places itself under the /opt/kaltura, therefore, pass configure shared,/opt/kaltura and set LDFLAGS to include /opt/kaltura/lib.
fix test for binary existance.
use our kaltura-libmemcached-devel and not memcached-devel and pass /opt/kaltura as path.
added declration needed deps for ffmpeg.
missing build deps.
link to additional needed RPM repositories.
resync additions from rhel_centos7 branch.
Merge branch 'Jupiter-10.1.0' into Jupiter-10.0.0-media-server

Conflicts:
	RPM/SPECS/kaltura-ffmpeg.spec
	RPM/SPECS/kaltura-opencore-amr.spec
	RPM/SPECS/php-mcrypt.spec