require.oracle_jdk.installed fails due to change in Oracle download URL

[emphanos]

Oracle has added a release-build specific hash to the download URL for a given tarball of jdk that breaks the oracle_jdk.installed task.

You can verify this by going to this page and going to the Download JDK page:

http://www.oracle.com/technetwork/java/javase/downloads

http://download.oracle.com/otn-pub/java/jdk/8u121-b13/e9e7ea248e2c4826b92b3f075a80e441/jdk-8u121-linux-x64.tar

The new hash e9e7ea248e2c4826b92b3f075a80e441 is specific to a specific build 8u121-b13 and needs to be part of the download URL.

I've patched the