Kazzing Gateway: Formalise the Maintainers line.

Solves Travis complaint:

  'RFC 2822 error: missing Maintainers'

Signed-off-by: Lee Jones <[email protected]>

library/kaazing-gateway

@@ -1,4 +1,4 @@
-# maintainer: Kaazing Docker Maintainers <https://github.com/kaazing/gateway.docker/issues> (@kaazing)
+Maintainers: Kaazing Docker Maintainers <https://github.com/kaazing/gateway.docker/issues> (@kaazing)
 
 latest: git://github.com/kaazing/gateway.docker@a40c8da9d2c2925bdd78b9a6d1b6da3fe89322d1 
 5.6.0: git://github.com/kaazing/gateway.docker@a40c8da9d2c2925bdd78b9a6d1b6da3fe89322d1