Remove test classes, launch configurations and configuration.

Remove test classes, launch configurations and configuration.

The test stuff was getting in the way when creating the war. To make
the war file you can now do 'mvn clean package'. The packaged war file
will be in the target directory.

* .classpath: Remove unused classpathentry for tests and i18n.
* pom.xml: Remove junit.jar dependency. Properly use gwt.version
property. Don't run test or i18n goals when packaging the war.
* src/main/webapp/WEB-INF/web.xml: Add xml name space. Correct
formatting.

Removed files:

* OnlineGlomTest-dev.launch:
* OnlineGlomTest-prod.launch:
* src/test/java/org/glom/web/client/GwtTestOnlineGlom.java:
* src/test/resources/org/glom/web/OnlineGlomJUnit.gwt.xml: