Swaps order of tags to prevent mis-tagging on build errors.

Per https://github.com/docker-library/official-images/pull/3587#issuecomment-337008682.

library/consul

@@ -1,4 +1,4 @@
 # maintainer: James Phillips <[email protected]> (@slackpad)
 
-latest: git://github.com/hashicorp/docker-consul@9fb940c32b6f46b0a77a640d7161054e00e97bbb 0.X
 1.0.0: git://github.com/hashicorp/docker-consul@9fb940c32b6f46b0a77a640d7161054e00e97bbb 0.X
+latest: git://github.com/hashicorp/docker-consul@9fb940c32b6f46b0a77a640d7161054e00e97bbb 0.X