Description of problem:
When pushing glossary without specifing translation languages,

Following message is shown:
[ERROR] Failed to execute goal org.zanata:zanata-maven-plugin:3.0.1-SNAPSHOT:glossary-push (default-cli) on project null: Zanata mojo exception: localeId -> [Help 1]

It will be more informative to say that transLang must be specified.

Version-Release number of selected component (if applicable):
Server Zanata version 3.0.0-alpha-2-SNAPSHOT (20130723-0033)
Client 3.0.1-SNAPSHOT (commit 4ad67d7066)

How reproducible:
Always

Steps to Reproduce:
1. mvn zanata:glossary-push -Dzanata.glossaryFile=compendium-zh_TW.po -Dzanata.url=<zanataServer>

Actual results:
[ERROR] Failed to execute goal org.zanata:zanata-maven-plugin:3.0.1-SNAPSHOT:glossary-push (default-cli) on project null: Zanata mojo exception: localeId -> [Help 1]


Expected results:
[ERROR] Failed to execute goal org.zanata:zanata-maven-plugin:3.0.1-SNAPSHOT:glossary-push (default-cli) on project null: Zanata mojo exception: transLang must be specified  -> [Help 1]


Additional info: