testenv/test/base_test.py: Add new variable SKIP_TEST
testenv/Test--https-crl.py: Use SKIP_TEST instead of magic number
testenv/Test--https.py: Same
testenv/Test-hsts.py: Same
testenv/Test-no_proxy-env.py: Same
testenv/Test-pinnedpubkey-der-https.py: Same
testenv/Test-pinnedpubkey-der-no-check-https.py: Same
testenv/Test-pinnedpubkey-hash-https.py: Same
testenv/Test-pinnedpubkey-hash-no-check-fail-https.py: Same
testenv/Test-pinnedpubkey-pem-fail-https.py: Same
testenv/Test-pinnedpubkey-pem-https.py: Same
* testenv/Test-no_proxy-env.py: Added new test for no_proxy env
* testenv/Makefile.am: Added the new test to Makefile
Added new test with 5 cases, which are testing various combinations
of no_proxy environment variable definition and requested URLs.
The test is skipped if the system does not support resolution of
localhost subdomains to lcalhost address.
Signed-off-by: Tomas Hozza <thozza@redhat.com>