Fix py35/py36 and k-a-ubuntu-source gate jobs

- py35/py36 jobs are failing
python 3.6 pycache also includes links - so those also
need to be removed by tox testenv

- kolla-ansible-ubuntu-source job is failing
Without basedir set in galera.cnf - mysql_install_db looks for resolveip
in /usr/sbin, instead of /usr/bin, thus complains about cannot resolving
neither $HOSTNAME, nor localhost.

Change-Id: I40514c0a7c43ae01c7680aac81123942be1cdef9

ansible/roles/mariadb/templates/galera.cnf.j2

@@ -8,6 +8,9 @@ default-character-set=utf8
 default-character-set=utf8
 
 [mysqld]
+{% if kolla_base_distro in ['debian', 'ubuntu'] %}
+basedir=/usr
+{% endif %}
 bind-address={{ api_interface_address }}
 port={{ mariadb_port }}
 

tox.ini

@@ -15,7 +15,7 @@ passenv = http_proxy HTTP_PROXY https_proxy HTTPS_PROXY no_proxy NO_PROXY
           OS_STDOUT_CAPTURE OS_STDERR_CAPTURE OS_LOG_CAPTURE OS_TEST_TIMEOUT
           PYTHON OS_TEST_PATH LISTOPT IDOPTION
 commands =
-  find . -type f -name "*.py[c|o]" -delete
+  find . -type f -name "*.py[c|o]" -delete -o -type l -name "*.py[c|o]" -delete
   find . -type d -name "__pycache__" -delete
   stestr run --slowest {posargs}