contint: move jenkins-deploy user home to /dev/vdb

`jenkins-deploy` user home dir ends up being in /home/ which is using
GlusterFS on the integration project.

Additionally, we need the home directory to be local to the instance
since it is used by gems/npm as a local cache.

To avoid using GlusterFS and race conditions, migrate it to
/mnt/home/jenkins-deploy which is a /dev/vdb mount.

WARNING: need to update Jenkins slaves configurations

bug: 61144
Change-Id: Ie90874f23804e273bdfb4c698b19495f3aff56f8
Merge "contint: move jenkins-deploy user home to /dev/vdb" into production