Prepare for next developmen iteration

Change-Id: Id5426712f9c708ba12edf8d4cd9451de336a1885
Update kms-elements dependencies dependencies

Change-Id: I553a106213b6b1e9736af9378a6f49805a160167
Add opencv to generated pkg-config

Change-Id: I4fec44bfe8a2e3bfa1ecb69ff4d4dede35967923
OpenCVProcess: Add getSharedPtr function

Change-Id: I5838f268baea1350077bd3c937a707636a317e57
Fix compilation of gst-plugins

Change-Id: I56215b0cdfc6789d96fc3602a6ae61029694594d
Install generated FindKMSFILTERS.cmake

Change-Id: Iff8ba204a7c734ae8614f2abf86fa8e71889bd3c
Start using generic_find to look for dependencies

Change-Id: Iaf96f149e126e62bbddbe6ec8a8cd30c93b93857
Prepare release 5.0.4

Change-Id: I0c8afc3c245a0f7b7e4d53fd085640b540082a95