test/test_rbd_replay: move operator<<(..rbd_loc& name) to rbd_replay

so gtest can print out rbd_loc when printing out diagnostic information
when test fails. after moving operator<<(ostream&, const rbd_loc&) to
the `rbd_replay` namespace, ADL is able to find it. for more details on
the lookup rules, see https://en.cppreference.com/w/cpp/language/adl

Signed-off-by: Kefu Chai <kchai@redhat.com>
(cherry picked from commit fe696638515dc7a51214930049ebd1a6f951047f)

diff --git a/src/test/test_rbd_replay.cc b/src/test/test_rbd_replay.cc
index 24146875a271ad58ed3e9a23c6fd65f7ece8ee7c..c4a0b3a9ed6c65cd8fe203bcbf7f3dfa998c666d 100644 (file)
--- a/src/test/test_rbd_replay.cc
+++ b/src/test/test_rbd_replay.cc
@@ -22,11 +22,13 @@
 #include "rbd_replay/rbd_loc.hpp"
 
 
-using namespace rbd_replay;
-
+namespace rbd_replay {
 std::ostream& operator<<(std::ostream& o, const rbd_loc& name) {
   return o << "('" << name.pool << "', '" << name.image << "', '" << name.snap << "')";
 }
+}
+
+using namespace rbd_replay;
 
 static void add_mapping(ImageNameMap *map, std::string mapping_string) {
   ImageNameMap::Mapping mapping;