Description of problem:
For maven client, attributes such as url, project, project-version in
zanata.xml are not used on goal putproject.

Administrators do not have to type all the information which already contained
in zanata.xml 

How reproducible:
Always

Version-Release number of selected component (if applicable):


Steps to Reproduce:
1. Assume zanata.xml is:
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>

<config xmlns="http://zanata.org/namespace/config/">
    <url>http://zanata.server.com/</url>
    <project>AboutFedora</project>
    <project-version>f13</project-version>
    <locales>
        <locale map-from="ja-JP">ja</locale>
        <locale map-from="zh-CN">zh-Hans</locale>
    </locales>
</config>


2. Assume zanata.ini has following line:

zanata_1_4_auto.url=http://zanata.server.com/
zanata_1_4_auto.username=admin
zanata_1_4_auto.key=b6d7044e9ee3b2447c28fb7c50d86d98



3. mvn -e zanata:putversion

Actual results:
[ERROR] Failed to execute goal org.zanata:zanata-maven-plugin:1.4-SNAPSHOT:putversion (default-cli) on project null: The parameters 'versionProject', 'versionSlug' for goal org.zanata:zanata-maven-plugin:1.4-SNAPSHOT:putversion are missing or invalid -> [Help 1]

org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.zanata:zanata-maven-plugin:1.4-SNAPSHOT:putversion (default-cli) on project null: The parameters 'versionProject', 'versionSlug' for goal org.zanata:zanata-maven-plugin:1.4-SNAPSHOT:putversion are missing or invalid



Expected results:
Version "f13" should be created for Project AboutFedora.