mysql_db/user: Use password for my.cnf

According to the MySQL docs[0] the password should be stored after
'password=' instead of 'pass='.

[0] http://dev.mysql.com/doc/refman/5.1/en/password-security-user.html
mysql_user: handle unnecessary GRANT revocation
Add support for connection type in ansible_hosts file
CloudFormation support.
Handle delegate_to case for local connections in hosts file
Adding VPC subnet ID support
missed a spot.
Merge pull request #2175 from tyll/devel

mysql_db/user: Use password for my.cnf
Merge pull request #2185 from lwade/devel

Issue #2158 - add VPC subnet ID support
Merge pull request #2180 from jsmartin/cloudformation

CloudFormation support.
Merge pull request #2179 from skinp/host_connection

Add support for connection type in ansible_hosts file
Fix typo in svc docs
Best practices doc updates
Explain ansible_python_interp. a little better
Use yaml.safe_load as we are just using basic data structures