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_ms_timeout.err b/tests/msc_vlr/msc_vlr_test_ms_timeout.err
index 78218ac..c91f6a2 100644
--- a/tests/msc_vlr/msc_vlr_test_ms_timeout.err
+++ b/tests/msc_vlr/msc_vlr_test_ms_timeout.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_ms_timeout_lu_auth_resp
 - Total time passed: 0.000000 s
@@ -107,7 +107,7 @@
 ===== test_ms_timeout_lu_auth_resp: 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_ms_timeout_cm_auth_resp
 - Total time passed: 0.000000 s
@@ -345,7 +345,7 @@
 ===== test_ms_timeout_cm_auth_resp: 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_ms_timeout_paging
 - Total time passed: 0.000000 s
@@ -545,7 +545,7 @@
 ===== test_ms_timeout_paging: 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_classmark_update_timeout
 - Total time passed: 0.000000 s
@@ -675,8 +675,8 @@
 ===== test_classmark_update_timeout: 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