Modify the search order of dynamic library (#33722)

* Modify the search order of dynamic library

* Modify the search order of dynamic library

paddle/fluid/platform/dynload/dynamic_loader.cc

@@ -219,17 +219,17 @@ static inline void* GetDsoHandleFromSearchPath(
   for (auto dso : dso_names) {
     // 1. search in user config path by FLAGS
     dso_handle = GetDsoHandleFromSpecificPath(config_path, dso, dynload_flags);
-    // 2. search in extra paths
+    // 2. search in system default path
+    if (nullptr == dso_handle) {
+      dso_handle = GetDsoHandleFromDefaultPath(dso, dynload_flags);
+    }
+    // 3. search in extra paths
     if (nullptr == dso_handle) {
       for (auto path : extra_paths) {
         VLOG(3) << "extra_paths: " << path;
         dso_handle = GetDsoHandleFromSpecificPath(path, dso, dynload_flags);
       }
     }
-    // 3. search in system default path
-    if (nullptr == dso_handle) {
-      dso_handle = GetDsoHandleFromDefaultPath(dso, dynload_flags);
-    }
     if (nullptr != dso_handle) break;
   }
 

tools/parallel_UT_rule.py

@@ -665,7 +665,6 @@ TWO_PARALLEL_JOB = [
     'convert_model2dot_ernie',
     'im2col_test',
     'test_logical_op',
-    'test_imperative_mnist',
     'test_imperative_deepcf',
     'test_cholesky_op',
     'test_sample_logits_op',