Add dynts suite to test switch between PDCH and TCH

It seems for not yet clear reasons the MS require some time after the
PDCH channels have been activated again to use them reliably. If no
sleep is used between call hangup and gprs activate pdp ctx, the MS
fails to activate the pdp ctx due to QMI error respone to the "Start
network" requested.

Related: OS#2582
Change-Id: I73b51c31309ac4c28c64ed7eb7c8c649e535aa22
5 files changed