Merge lp:~townsend/libertine/fix-no-command into lp:libertine

[Christopher Townsend]

Check to make sure a subcommand was given and if not, print out the usage.

[Stephen M. Webb (bregma)]

review: Approve

[Libertine CI Bot (libertine-ci-bot)]

PASSED: Continuous integration, rev:203
https://jenkins.canonical.com/libertine/job/libertine-ci-verify-mp/181/
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review: Approve (continuous-integration)

=== modified file 'tools/libertine-container-manager'
--- tools/libertine-container-manager	2016-04-13 18:02:56 +0000
+++ tools/libertine-container-manager	2016-04-14 17:12:00 +0000
@@ -688,4 +688,7 @@
     if args.verbosity is None:
         args.verbosity = 1
 
-    args.func(args)
+    if args.subparser_name == None:
+        parser.print_help()
+    else:
+        args.func(args)