Simple typo fix .

Change-Id: I72c5ea73cd0a3625b94843a11abe9e5fcdaa55d5
(cherry picked from commit c3e18507d1d828ecc1307575a926ad299fe9e576)
diff --git a/provisioner/Dockerfile b/provisioner/Dockerfile
index f514520..6d75afb 100644
--- a/provisioner/Dockerfile
+++ b/provisioner/Dockerfile
@@ -12,7 +12,7 @@
 ## See the License for the specific language governing permissions and
 ## limitations under the License.
 FROM ubuntu:14.04
-MAINTAINER Open Networking Labratory <info@onlab.us>
+MAINTAINER Open Networking Laboratory <info@onlab.us>
 
 # Base image information borrowed by official golang wheezy Dockerfile
 RUN apt-get update && apt-get install -y --no-install-recommends \