etc/dists/scripts/*set_ugid_quota.sh: multiple fixes

1. Fix bashism (using == instead of = in [ statement). This prevented
   script from working in Debian-based containers with /bin/sh -> /bin/dash

2. Fix variable name in error message (SCRIPTNAME -> SCRIPTANAME)

3. Whitespace fixes.

Fixes issue 2 in bug #1734.
http://bugzilla.openvz.org/1734

Signed-off-by: Kir Kolyshkin <kir@openvz.org>
4 files changed