Moving to Flask-Security-Fork, other updates

[scriptsrc]

• Replacing Flask-Security with Flask-Security-Fork.
• Removing some explicit dependencies to rely on flask-security-fork dependencies.
• SSO will use flask-security login_user instead of flask-login so that security_trackable works.
• Replacing current_user.is_authenticated() method with property so we can use a newer version of flask-login.
• Bumping psycopg2, bcrypt, and cryptography versions.

[scriptsrc]

Big reason to move to Flask-Security-Fork is pallets-eco/flask-security-3.0#548

Without PR 548 being merged, it's vulnerable to logout redirection. Flask-Security-Fork is still receiving support.

[coveralls]

Coverage remained the same at 51.515% when pulling 51ca485 on update_some_dependencies into da8c81e on develop.

[scriptsrc]

pip uninstall flask-security && pip install flask-security-fork