VOL-408 First update for this Jira. This update nails down the version
of all containers that have multiple versions. There is one exceptoin
which is the centurylink/ra-certs conatiner that has only one single tag
which is "latest" all others have been nailed to the latest version tag.

Typo in reviewer comments fixed.

Change-Id: I2f015a0939fcedef89b6e102ad92032b11cb5e98
diff --git a/docker/Dockerfile.registrator b/docker/Dockerfile.registrator
index fe261a3..219cc4d 100644
--- a/docker/Dockerfile.registrator
+++ b/docker/Dockerfile.registrator
@@ -15,7 +15,7 @@
 # limitations under the License.
 #
 
-FROM gliderlabs/registrator:master
+FROM gliderlabs/registrator:v7
 
 #FROM registrator:dev
 #ENTRYPOINT ["/bin/registrator"]