* reduce async sleep time in test
* make zypper test less destructive (don't break following uses of zypper)
* fix ca cert on suse
* fix/enable postgres/mysql on opensuseleap
* fix mysql test for mysql versions 5.7.6 and newer
* skip sni_host check on ubuntu1604
* add HTTPTESTER flag for test_uri
ubuntu 16.04 uses dash which drops env variables containing a dot
we work around this by adding an explicit env variable to enable httptester
Adding the following Test Coverage for RedHat and Debian OS:
- Use mysql_db module to create, delete databases using different encoding.
- Backup/Restore databases using different file format: sql, gz and bz2.
- Create and delete databases using different user privilege.
- Assert database creation, deleting and content using system commands.
