Dev tools : password generator

[Shankhanil]

Developed a password generator tool which will generate password of length 8-12

Following updates are upcoming in the next version:

1. A checker for password strength
2. A preferences file to update the preferences for password as per specific requirements.

The following things are to be noted while review:
The password.spec.js file includes 2 tests :

1. Length test, checking that always passwords of length 8-12 are produced
2. password strength test : which passes by default (as of now, will be updated to check for strong passwords once password strength checker is build)