Switch from MySQL-python to PyMySQL

This is recommended community wide. We sould following the guidelines.
https://etherpad.openstack.org/p/liberty-cross-project-python3

Change-Id: I8eb1d987d43089b349475d30d5c6e197fbf27323

install.sh

@@ -73,7 +73,7 @@ basic_configuration() {
     if echo $conf_path | grep ".conf$" >/dev/null 2>&1
     then
         iniset $target DEFAULT auth_encryption_key `hexdump -n 16 -v -e '/1 "%02x"' /dev/random`
-        iniset $target database connection "mysql://senlin:senlin@localhost/senlin?charset=utf8"
+        iniset $target database connection "mysql+pymysql://senlin:senlin@localhost/senlin?charset=utf8"
 
         BRIDGE_IP=127.0.0.1
 

test-requirements.txt

@@ -10,8 +10,9 @@ mock>=1.0
 mox>=0.5.3
 oslosphinx>=2.5.0 # Apache-2.0
 oslotest>=1.5.1 # Apache-2.0
-paramiko>=1.13.0
 os-testr>=0.1.0
+paramiko>=1.13.0
+PyMySQL>=0.6.2  # MIT License
 sphinx!=1.2.0,!=1.3b1,<1.3,>=1.1.2
 testrepository>=0.0.18
 testscenarios>=0.4

tox.ini

@@ -8,6 +8,7 @@ skipsdist = True
 # Note the hash seed is set to 0 until senlin can be tested with a
 # random hash seed successfully.
 setenv = VIRTUAL_ENV={envdir}
+         OS_TEST_DBAPI_ADMIN_CONNECTION=mysql+pymysql://openstack_citest:openstack_citest@localhost/;postgresql://openstack_citest:openstack_citest@localhost/postgres;sqlite://
          PYTHONHASHSEED=0
 usedevelop = True
 install_command = pip install {opts} {packages}