BSSGP_Emulation: usse alive-type for internal BVC created components

Otherwise, during shutdown of all components we may end up in a
situation where the BVC is already killed and BSSGP Emulation receives
a packet which tries to forward to BVC and fails.

This can be seen quite a lot in PCU_Tests.TC_pcuif_suspend:
"""
PCU_Tests.ttcn:394 setverdict(pass): none -> pass
...
PCUIF_Components.ttcn:246 Stopping test component execution.
...
GPRS_Components.ttcn:222 Connection of port BSSGP[0] to TC_pcuif_suspend-BVCI1234(6):BSSGP_SP was closed unexpectedly by the peer.
...
GPRS_Components.ttcn:222 Port BSSGP[0] was disconnected from TC_pcuif_suspend-BVCI1234(6):BSSGP_SP.
...
Component type BSSGP_Emulation.BSSGP_BVC_CT was shut down inside testcase TC_pcuif_suspend
...
BSSGP_Emulation.ttcnpp:317 Dynamic test case error: Sending data on the connection of port BVC to 6:BVC failed. (Broken pipe)
"""

Change-Id: Ib0adcf64eb5ca876cd9e9b91f2b597804c03bdc2
1 file changed