supress error messages when can't pars my.cnf

[Aleksandr Kuzminsky]

when python ConfigParser can't parse my.cnf it doesn't read user/password from it.
It also produces a lot of error messages which may be confusing.

2015-06-26 18:01:20,801: twindb: ERROR: get_mysql_connection():212: File contains parsing errors: /etc/mysql/my.cnf
        [line 43]: ...
        [line 82]: ...
        [line 117]: ...
        [line 118]: ...
        [line 122]: ...
        [line 131]: ...
2015-06-26 18:01:21,236: twindb: ERROR: get_mysql_connection():213: Ignoring options file /etc/mysql/my.cnf
2015-06-26 18:01:21,660: twindb: ERROR: get_mysql_connection():226: Can not connect to local MySQL server
2015-06-26 18:01:22,095: twindb: ERROR: get_mysql_connection():227: MySQL said: Access denied for user 'root'@'localhost' (using password: YES)
2015-06-26 18:01:22,516: twindb: INFO: get_mysql_connection():229: Try to call the agent with -u and -p options to specify MySQL user and password