msc_vlr_tests: make all test functions static

All functions in the individual msc_vlr_test_*.c files should be static; hence
we would be warned if one of them were unused (forgotten to add to the tests
array).

Change-Id: Ia169c6a1443a48879ab4777e09c2040c48810bf6
diff --git a/tests/msc_vlr/msc_vlr_test_authen_reuse.c b/tests/msc_vlr/msc_vlr_test_authen_reuse.c
index 103c904..e78ab06 100644
--- a/tests/msc_vlr/msc_vlr_test_authen_reuse.c
+++ b/tests/msc_vlr/msc_vlr_test_authen_reuse.c
@@ -38,10 +38,10 @@
 		break; \
 	}
 
-void _test_auth_reuse(enum ran_type via_ran,
-		      int set_max_reuse_count,
-		      int loop_requests_without_hlr,
-		      bool final_request_with_hlr)
+static void _test_auth_reuse(enum ran_type via_ran,
+			     int set_max_reuse_count,
+			     int loop_requests_without_hlr,
+			     bool final_request_with_hlr)
 {
 	struct vlr_subscr *vsub;
 	const char *imsi = "901700000010650";
@@ -284,42 +284,42 @@
 	clear_vlr();
 }
 
-void test_auth_use_twice_geran()
+static void test_auth_use_twice_geran()
 {
 	comment_start();
 	_test_auth_reuse(RAN_GERAN_A, 1, 1, true);
 	comment_end();
 }
 
-void test_auth_use_twice_utran()
+static void test_auth_use_twice_utran()
 {
 	comment_start();
 	_test_auth_reuse(RAN_UTRAN_IU, 1, 1, true);
 	comment_end();
 }
 
-void test_auth_use_infinitely_geran()
+static void test_auth_use_infinitely_geran()
 {
 	comment_start();
 	_test_auth_reuse(RAN_GERAN_A, -1, 3, false);
 	comment_end();
 }
 
-void test_auth_use_infinitely_utran()
+static void test_auth_use_infinitely_utran()
 {
 	comment_start();
 	_test_auth_reuse(RAN_UTRAN_IU, -1, 3, false);
 	comment_end();
 }
 
-void test_no_auth_reuse_geran()
+static void test_no_auth_reuse_geran()
 {
 	comment_start();
 	_test_auth_reuse(RAN_GERAN_A, 0, 0, true);
 	comment_end();
 }
 
-void test_no_auth_reuse_utran()
+static void test_no_auth_reuse_utran()
 {
 	comment_start();
 	_test_auth_reuse(RAN_UTRAN_IU, 0, 0, true);