New NIST Password Guidelines + Changing Password Length Policy

[mdueltgen]

https://cybersecuritynews.com/nist-rules-password-security/
https://pages.nist.gov/800-63-3/sp800-63b.html

New NIST Guidelines change password recommended length to 15 so GWS.COMMONCONTROLS.5.2v0.3 should be updated from the current length of 12

[adhilto]

NIST's guidance is: "Verifiers and CSPs SHALL require passwords to be a minimum of eight characters in length and SHOULD require passwords to be a minimum of 15 characters in length." We might want to also adopt as split SHALL/SHOULD approach here as well rather than just upping the SHALL minimum to 15.

[mdueltgen]

Agreed we should follow NIST guidance, we will need to split into two policies of
Shall be minimum 8
Should be minimum of 15

[buidav]

Closed by #460