tests: xlate: print output in same way as nft-test.py

tests: xlate: print output in same way as nft-test.py

Print errors and total no. of tests, tests passed, failed and errors for
testfile argument
Remove option "--all"
Print file names for which all tests are passed with OK
For e.g -
sudo ./xlate-test.py
generic.txlate: OK
libip6t_DNAT.txlate: OK
...
libxt_TCPMSS.txlate: Fail
src: iptables-translate -A FORWARD -p tcp --tcp-flags SYN,RST SYN -j
TCPMSS --clamp-mss-to-pmtu
exp: nft add rule ip filter FORWARD tcp flags & (syn|rst) == syn counter
tcp option maxseg size set rt mtu
res: nft # -A FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS
--clamp-mss-to-pmtu
...
libxt_connlabel.txlate: Error: iptables-translate failure
iptables-translate v1.6.1: Couldn't load match `connlabel':No such file
or directory
...
64 test files, 246 tests, 242 tests passed, 2 tests failed, 2 errors

sudo ./xlate-test.py extensions/libxt_iprange.txlate
1 test file, 5 tests, 5 tests passed, 0 tests failed, 0 errors

sudo ./xlate-test.py extensions/libxt_connlabel.txlate
extensions/libxt_connlabel.txlate: Error: iptables-translate failure
iptables-translate v1.6.1: Couldn't load match `connlabel':No such file
or directory
...
1 test file, 2 tests, 0 tests passed, 0 tests failed, 2 errors

Signed-off-by: Harsha Sharma <harshasharmaiitr@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>