Prepare next development iteration

Change-Id: I9b4652d75e2b5eeaa7349eec04fd00feb6010f6a
Update plugins

Change-Id: I0b3a986f660d2cf341427fa62b03219d9bbd3f97
Fix program abnormal termination

When a shared pointer is destroyed, but destructor has already called
an event could be reached, causing bad_weak_ptr to be raised

Change-Id: I95666e0ac743bd4a1bd3e34699a2e80267e3b2d6
Enable core dump creation

Change-Id: I29bea886865f008b7d862380ce56f7722df53fca
Create package with debuging symbols

Change-Id: Ib4d72508fdc9dd58a131e4f5978e5a908b663560
Fix warning in debian package creation

Change-Id: Ie4a4539acbe4c2df1546c9995e0ee42fae0d0bf4
Fix kurento dependency for kurento-dev package

Change-Id: Ica35763a379176a46a79934b95f480af3dbb6525
MediaPipeline: Enable gstreamer debug

Change-Id: Ia5287881ed406bf630e9c7b662a0495bbc4f225c
MediaPipeline: Dot not raise error events if it is an stream error

This is a temporal fix:

This events are causing test failures and most of the times error is
automatically solved, we need to investigate this errors further.

Change-Id: Idf6e2e9137daf8b64896cfc98b90fd9e2f269d49
MediaSet: Change Monitor by Glib Lock class

Change-Id: I25491cfcbc09c7006982c25b3fcc41d20ec0668b
MediaSet: Release lock before adding tasks to threadPool

Change-Id: Idb6fa279e3ea943cb6f302f2cd184681dabec3d0
MediaSet: Minor fix, use namespace to make lines shorter

Change-Id: I2800142c1d02f6368970000862af2ac4c097d8d8
MediaSinkImpl: block peer pad before unlinking

Change-Id: I7aaf69ee32a828bc37ed080495b8e612dce0a520
PointerDetectorFilter: Add disconnect signals in destructor

Change-Id: I7735909eb05b5bb359bbf5f865b5f420054c6106
MediaSet: Create a shared_ptr to avoid bad_weak_ptr exception while element is waiting for a thread

Change-Id: I8692891141db79df08bee647632666d86a2dfd01
Prepare release 4.2.2

Change-Id: I7573b1981dbd74dc99972faf08748e201721c9f2