(bug 55129)(bug 54898) Add nightlies version file support

The nightly generation has also been updated to use this format.

This is also a workaround for Bug 61310 (bot will not crash anymore)

Change-Id: Idf6114558b63627ab56f7c16d9f6f3ce436aa706
Merge "(bug 55129)(bug 54898) Add nightlies version file support"