Modifies MON to create database if using mysql URI

Removes default value of config in VimCredentials as MySQL does not support
it.
Adds pymysql as dependency.

Change-Id: Idb60029e027f8abad7de4617c12bde20aa66deab
Signed-off-by: Benjamin Diaz <bdiaz@whitestack.com>
diff --git a/setup.py b/setup.py
index 2126358..15828bb 100644
--- a/setup.py
+++ b/setup.py
@@ -65,6 +65,7 @@
         "python-ceilometerclient==2.9.*",
         "peewee-migrate==1.1.*",
         "python-novaclient==12.0.*",
+        "pymysql==0.9.*",
         "osm-common",
         "n2vc"
     ],