Tests: minor improvements.

Added "go" availability check before trying to build an application.

update_action() method used were possible and fixed bug with
the relative path determination in test_static_chroot.py.

Templates optimization and style fixes.

test/test_tls.py

@@ -13,7 +13,7 @@ class TestTLS(TestApplicationTLS):
     prerequisites = {'modules': {'python': 'any', 'openssl': 'any'}}
 
     def openssl_date_to_sec_epoch(self, date):
-        return self.date_to_sec_epoch(date, '%b %d %H:%M:%S %Y %Z')
+        return self.date_to_sec_epoch(date, '%b %d %X %Y %Z')
 
     def add_tls(self, application='empty', cert='default', port=7080):
         assert 'success' in self.conf(