Move gerrit_common_test.pl to the prolog package

This is a continuation to the changes in Ibd8c5362.

Release-Notes: skip
Change-Id: I2f80ed8702cb8ab392b8d7681b1fe113278636af
diff --git a/prologtests/BUILD b/prologtests/BUILD
index 279dbb7..3a598be 100644
--- a/prologtests/BUILD
+++ b/prologtests/BUILD
@@ -1,5 +1,5 @@
 filegroup(
     name = "gerrit_common_test",
-    srcs = ["com/google/gerrit/server/rules/gerrit_common_test.pl"],
+    srcs = ["com/google/gerrit/server/rules/prolog/gerrit_common_test.pl"],
     visibility = ["//visibility:public"],
 )
diff --git a/prologtests/com/google/gerrit/server/rules/gerrit_common_test.pl b/prologtests/com/google/gerrit/server/rules/prolog/gerrit_common_test.pl
similarity index 100%
rename from prologtests/com/google/gerrit/server/rules/gerrit_common_test.pl
rename to prologtests/com/google/gerrit/server/rules/prolog/gerrit_common_test.pl