Merge branch 'branch-0.3.1' into 'branch-0.3.1'

reduce unittest time cost

See merge request megasearch/milvus!158

Former-commit-id: da369fc7b5c2c48c2320a0deb845c75b85c6825a

cpp/unittest/db/db_tests.cpp

@@ -21,7 +21,7 @@ namespace {
     static const std::string TABLE_NAME = "test_group";
     static constexpr int64_t TABLE_DIM = 256;
     static constexpr int64_t VECTOR_COUNT = 250000;
-    static constexpr int64_t INSERT_LOOP = 100000;
+    static constexpr int64_t INSERT_LOOP = 10000;
 
     engine::meta::TableSchema BuildTableSchema() {
         engine::meta::TableSchema table_info;

cpp/unittest/db/mysql_db_test.cpp

@@ -21,7 +21,7 @@ namespace {
     static const std::string TABLE_NAME = "test_group";
     static constexpr int64_t TABLE_DIM = 256;
     static constexpr int64_t VECTOR_COUNT = 250000;
-    static constexpr int64_t INSERT_LOOP = 100000;
+    static constexpr int64_t INSERT_LOOP = 10000;
 
     engine::meta::TableSchema BuildTableSchema() {
         engine::meta::TableSchema table_info;