Password escaping with special characters

[luke-barnett]

I believe there is an issue with how passwords are currently being escaped, however, I don't fully understand how/why. We've found that some special characters cause an authentication failure when using the deploy task and the fix seems to be the use of double quotation marks over single quotation marks (as currently used).

It works but I don't understand enough to know why but if it's the solution I'm keen to get it upstream as currently our work around is to drop special characters from passwords which isn't ideal as you shouldn't have to worry about it.

I'll get a PR for this going shortly.

[luke-barnett]

PR created #21