fstests: Make ./new work for non-root user

Currently 'new' script sources common/config which tries to find
mkfs and fails if not found (which is likely for non-root user).
This is inconvenient as development usually does not happen as root.
In fact the vast majority of setup in common/config and common/rc is
not necessary for 'new'. Split out the necessary bits into new
common/test_names and use it in 'new'. Cleanup common/rc and
common/config now that they're only used from 'check' and 'setup'.

Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>

new

@@ -23,7 +23,7 @@
 
 # generic initialization
 iam=new
-. ./common/rc
+. ./common/test_names
 
 trap "rm -f /tmp/$$.; exit" 0 1 2 3 15
 
@@ -81,6 +81,9 @@ line=0
 eof=1
 [ -f "$tdir/group" ] || usage
 
+export AWK_PROG="$(type -P awk)"
+[ "$AWK_PROG" = "" ] && { echo "awk not found"; exit; }
+
 for found in `cat $tdir/group | tr - ' ' | $AWK_PROG '{ print $1 }'`
 do
     line=$((line+1))