Adding an ability to set target for mysql user grant.

Change-Id: I793a25750c39f70aa26415e7e6a95100b33373fe
diff --git a/tests/pillar/server_client_database.sls b/tests/pillar/server_client_database.sls
index 2cb29ea..ca85cfb 100644
--- a/tests/pillar/server_client_database.sls
+++ b/tests/pillar/server_client_database.sls
@@ -18,6 +18,7 @@
           password: password
           host: '%'
           rights: all
+          target: 'nova.*'
         - name: nova
           password: password
           host: 127.0.0.1