MT#9425 init: set umask and perms for HOMERUN. Set perms on /tmp/ngcp

Change-Id: I0e9b71da05a863529841eadcb4e81c878769240c
MT#9445 Set voicemail_users tz to 'vienna'

This makes it backwards-compatible to ossbss. At some point, the
timezone should be taken from the customer or domain, but that would
need to affect also CDRs etc.