fixes

liblinphone!2771 (merged) mediastreamer2!887 (merged)

Database:

• Do not use temporary variable in soci:use

  Conference Scheduler:

  • Do not attempt to send an ICS message to ourselves

  Capability Negotiation Tester:

  • When a call changes encryption towards DTLS or ZRTP, wait for the callback encryption change before moving on as ZRTP key negotiation might be slow in some cases

  Local Conference Tester:

  • Expand usage of wait_for_conference_streams to make sure that a conference is full established instead of relying on the number of the state changes of a call to a particular state