Republish javadocs to show latest (0.7.0)

[omaray]

SCENARIO

• Navigate to https://github.com/GoogleCloudPlatform/google-cloud-java
• Click on the doc link at the top: http://googlecloudplatform.github.io/google-cloud-java

EXPECTED RESULTS

• You should navigate to the 0.7.0 docs at http://googlecloudplatform.github.io/google-cloud-java/0.7.0/index.html

ACTUAL RESULTS

• You navigate to the 0.6.0 docs at: http://googlecloudplatform.github.io/google-cloud-java/0.6.0/index.html

(And clicking on "Read The Docs" button takes you to the javadoc of the 0.6.0 as well and it should be 0.7.0)

[garrettjonesgoogle]

Docs are now published for 0.7.0.