kvs/test: bail out on failed cache_create()

Problem: In kvsroot and kvs_wait_version tests we should bail out
if a call to cache_create() fails.  This is missed in some cases.

Call BAIL_OUT if cache_create() fails.

Author: chu11

src/modules/kvs/test/kvs_wait_version.c

@@ -53,7 +53,8 @@ void basic_api_tests (void)
     struct kvsroot *root;
     flux_msg_t *msg;
 
-    cache = cache_create (NULL);
+    if (!(cache = cache_create (NULL)))
+        BAIL_OUT ("cache_create");
 
     ok ((krm = kvsroot_mgr_create (NULL, NULL)) != NULL,
         "kvsroot_mgr_create works");
@@ -190,7 +191,8 @@ void basic_remove_tests (void)
     struct kvsroot *root;
     int i;
 
-    cache = cache_create (NULL);
+    if (!(cache = cache_create (NULL)))
+        BAIL_OUT ("cache_create");
 
     ok ((krm = kvsroot_mgr_create (NULL, NULL)) != NULL,
         "kvsroot_mgr_create works");

src/modules/kvs/test/kvsroot.c

@@ -32,7 +32,8 @@ void basic_api_tests (void)
     struct flux_msg_cred cred;
     flux_msg_t *request;
 
-    cache = cache_create (NULL);
+    if (!(cache = cache_create (NULL)))
+        BAIL_OUT ("cache_create");
 
     ok ((krm = kvsroot_mgr_create (NULL, &global)) != NULL,
         "kvsroot_mgr_create works");
@@ -170,7 +171,8 @@ void basic_api_tests_non_primary (void)
     struct cache *cache;
     struct kvsroot *root;
 
-    cache = cache_create (NULL);
+    if (!(cache = cache_create (NULL)))
+        BAIL_OUT ("cache_create");
 
     ok ((krm = kvsroot_mgr_create (NULL, &global)) != NULL,
         "kvsroot_mgr_create works");
@@ -225,7 +227,8 @@ void basic_iter_tests (void)
     struct kvsroot *root;
     int count;
 
-    cache = cache_create (NULL);
+    if (!(cache = cache_create (NULL)))
+        BAIL_OUT ("cache_create");
 
     ok ((krm = kvsroot_mgr_create (NULL, &global)) != NULL,
         "kvsroot_mgr_create works");
@@ -285,7 +288,8 @@ void basic_kvstxn_mgr_tests (void)
     json_t *ops = NULL;
     void *tmpaux;
 
-    cache = cache_create (NULL);
+    if (!(cache = cache_create (NULL)))
+        BAIL_OUT ("cache_create");
 
     ok ((krm = kvsroot_mgr_create (NULL, &global)) != NULL,
         "kvsroot_mgr_create works");