Load .bash_profile by full absolute path

When sourcing by relative path, I got this error
```
TASK: [ruby | source ~/.bash_profile] ***************************************** 
<127.0.0.1> REMOTE_MODULE command . ~/.bash_profile executable=/bin/bash
failed: [vlad] => {"changed": true, "cmd": [".", "~/.bash_profile"], "delta": "0:00:00.002385", "end": "2014-10-09 03:55:48.213379", "item": "", "rc": 127, "start": "2014-10-09 03:55:48.210994"}
stderr: .: ~/.bash_profile: No such file or directory
```

If I use full path, using variable `{{ user }}`, I don't have any problem.