Add fstype arg to the mount examples

Needed fstype in the examples, since fstype is a required argument for
mount.
Adding the following Test Coverage:

Use mysql_user module to create, delete users.
Update user password and ensure new password was updated for the correct user.
Assert user has access to multiple databases
Assert user creation, deleting using different user privilege and ensure privilege work correctly.
Move splitter to module_utils so modules can use it and fix command arg splitting

Fixes #8338
Merge branch 'integration_mysql_user' of https://github.com/wrosario/ansible into wrosario-integration_mysql_user
Merge branch 'wrosario-integration_mysql_user' into devel
Merge pull request #8283 from ps-jay/sys_mount_fstype_doc

Add fstype arg to the mount examples
Remove whitespace around args

Fixes #8343
Use cheaper substring search instead of regex when filtering non-JSON output from modules.

Larger transfers using the copy module would peg the CPU and slow to a crawl if an "=" existed toward the end of the base64 data in "content" key.
Try to only scan line once for = characters.