Increase security for password storage

Problem/Motivation

Passwords are being saved as plain text in Drupal, which isn't a security best practice. Please consider using password hashing or integrating the use of https://www.drupal.org/project/key → for this module.

Steps to reproduce

Go to Edit Connection and see that password is saved in plain text

Proposed resolution

Use Key to encrypt passwords stored in Drupal for connections to PoolParty.

Remaining tasks

User interface changes

API changes

Data model changes