Changes

msc: CC SETUP MT speech: verify bearer capabilities

Verify that the MSC sends the bearer capability IE from 3GPP TS 24.008 §
D.1.2 for speech in the network to MS direction, instead of allowing
e.g. what osmo-msc master and latest release currently do:

 - Filling out radio channel requirement the same way as the MS to
   Network direction, which is wrong for the Network to MS direction:
   "Bits 6 and 7 are spare bits. The sending side (i.e. the network)
   shall set bit 7 to value 0 and bit 6 to value 1." (3GPP TS 24.008
   Table 10.5.102)

 - Sending a speech list in the Network to MS direction, which seems to
   be allowed in theory and MS are supposed to ignore it (end of Table
   10.5.103) but causes bugs in some MS in practice. Therefore it is
   better to ensure that osmo-msc does not send it (OS#6656).

Implement this in f_mt_call_complete(), which gets used e.g. by
TC_lu_and_mt_call.

Depends: osmo-msc I7046e9244fd9d4301ee2c4df1147a619f753739c
Related: OS#6657, OS#6655, OS#6656
Change-Id: I8fd33cf2f7fb8a1c34851ecf54fccddd2efd0536

Add optonal e-RAB lists to HANDOVER messages

These lists are required to test release of e-RABs during handover
prparation and indication of failed e-RABS during handover resource
allocation.

New templates for the new lists and list items are added.

Related: SYS#7309
Change-Id: I78d2fa8e72bb672674727a01d5c5a9aaf31cab7b

S1GW: Add test case to test release of e-RABs during handover preperation

HANDOVER COMMAND allows e-EABs to be forwarded or to be released. The
test provides two lists and expects osmo-s1gw to release only those
e-RABs that are included int the "E-RABs to Release List" IE.

Related: SYS#7309
Change-Id: Ic70ba19c0a6e349f63aae124607d075b6d19e779

S1GW: Add test case to test release of failed e-RABs during handover resource allocation

HANDOVER REQUEST ACKNOWLEDGE indicates admitted and failed eRABs. The
test provides two lists and expects osmo-s1gw to release only those
e-RABs that are included int the "E-RABs Failed to Setup List" IE.

Related: SYS#7309
Change-Id: Ic14f560ae16b8386e58ac85f8af53b19d7c7a5c9