make gsup ipa name configurable in osmo-msc.cfg

Add a 'ipa-name' VTY command which overrides the default IPA name
used by the MSC. This is a prerequisite for inter-MSC handover.

Related: OS#3355
Change-Id: I317d6c59f77e92fbb2b875a83dc0ec2fa5cb6006
diff --git a/tests/msc_vlr/msc_vlr_test_rest.err b/tests/msc_vlr/msc_vlr_test_rest.err
index 90905c8..1f0f509 100644
--- a/tests/msc_vlr/msc_vlr_test_rest.err
+++ b/tests/msc_vlr/msc_vlr_test_rest.err
@@ -1,5 +1,5 @@
 full talloc report on 'msgb' (total      0 bytes in   1 blocks)
-talloc_total_blocks(tall_bsc_ctx) == 12
+talloc_total_blocks(tall_bsc_ctx) == 13
 
 ===== test_early_stage
 - NULL conn
@@ -48,7 +48,7 @@
 ===== test_early_stage: SUCCESS
 
 full talloc report on 'msgb' (total      0 bytes in   1 blocks)
-talloc_total_blocks(tall_bsc_ctx) == 12
+talloc_total_blocks(tall_bsc_ctx) == 13
 
 ===== test_cm_service_without_lu
 - CM Service Request without a prior Location Updating
@@ -91,7 +91,7 @@
 ===== test_cm_service_without_lu: SUCCESS
 
 full talloc report on 'msgb' (total      0 bytes in   1 blocks)
-talloc_total_blocks(tall_bsc_ctx) == 12
+talloc_total_blocks(tall_bsc_ctx) == 13
 
 ===== test_two_lu
 - Location Update request causes a GSUP LU request to HLR
@@ -352,7 +352,7 @@
 ===== test_two_lu: SUCCESS
 
 full talloc report on 'msgb' (total      0 bytes in   1 blocks)
-talloc_total_blocks(tall_bsc_ctx) == 12
+talloc_total_blocks(tall_bsc_ctx) == 13
 
 ===== test_lu_unknown_tmsi
 - Location Update request with unknown TMSI sends ID Request for IMSI
@@ -498,8 +498,8 @@
 ===== test_lu_unknown_tmsi: SUCCESS
 
 full talloc report on 'msgb' (total      0 bytes in   1 blocks)
-talloc_total_blocks(tall_bsc_ctx) == 12
+talloc_total_blocks(tall_bsc_ctx) == 13
 
 full talloc report on 'msgb' (total      0 bytes in   1 blocks)
-talloc_total_blocks(tall_bsc_ctx) == 12
+talloc_total_blocks(tall_bsc_ctx) == 13