COMMON/UCX: suppressed coverity warnings

- suppressed coverity warnings - added log messages on failed calls

Signed-off-by: Sergey Oblomov <sergeyo@mellanox.com>

ompi/mca/osc/ucx/osc_ucx_active_target.c

@@ -193,7 +193,9 @@ int ompi_osc_ucx_complete(struct ompi_win_t *win) {
             OSC_UCX_VERBOSE(1, "ucp_atomic_post failed: %d", status);
         }
 
-        opal_common_ucx_ep_flush(ep, mca_osc_ucx_component.ucp_worker);
+        if (OMPI_SUCCESS != opal_common_ucx_ep_flush(ep, mca_osc_ucx_component.ucp_worker)) {
+            OSC_UCX_VERBOSE(1, "opal_common_ucx_ep_flush failed");
+        }
     }
 
     OBJ_RELEASE(module->start_group);

ompi/mca/osc/ucx/osc_ucx_component.c

@@ -825,7 +825,9 @@ int ompi_osc_ucx_free(struct ompi_win_t *win) {
         ucp_worker_progress(mca_osc_ucx_component.ucp_worker);
     }
 
-    opal_common_ucx_worker_flush(mca_osc_ucx_component.ucp_worker);
+    if (OMPI_SUCCESS != opal_common_ucx_worker_flush(mca_osc_ucx_component.ucp_worker)) {
+        OSC_UCX_VERBOSE(1, "opal_common_ucx_worker_flush failed");
+    }
 
     ret = module->comm->c_coll->coll_barrier(module->comm,
                                              module->comm->c_coll->coll_barrier_module);

opal/mca/common/ucx/common_ucx.c

@@ -89,7 +89,12 @@ OPAL_DECLSPEC void opal_common_ucx_mca_register(void)
     opal_common_ucx.output = opal_output_open(NULL);
     opal_output_set_verbosity(opal_common_ucx.output, opal_common_ucx.verbose);
 
-    mca_base_framework_open(&opal_memory_base_framework, 0);
+    if (OPAL_SUCCESS != mca_base_framework_open(&opal_memory_base_framework, 0)) {
+        /* failed to initialize memory framework - just exit */
+        MCA_COMMON_UCX_VERBOSE(1, "%s", "failed to initialize memory base framework, "
+                                        "memory hooks will not be used");
+        return;
+    }
 
     /* Set memory hooks */
     if (opal_common_ucx.opal_mem_hooks &&