Update centos to 7.3.1611

Change-Id: I0418289470615cf336b08d7ee1dc2c335f5924c5
diff --git a/docker/centos7/Makefile b/docker/centos7/Makefile
index 9440178..bd77b49 100644
--- a/docker/centos7/Makefile
+++ b/docker/centos7/Makefile
@@ -13,7 +13,7 @@
 # End of the variables that can be customized
 
 define DOCKERFILE
-FROM centos:7.2.1511
+FROM centos:7.3.1611
 MAINTAINER $(VENDOR)
 
 # Allow remote connectivity and sudo