allow to setup admin password

[mkyc]

Currently I have:

nexus:
  properties:
    override: true
    data:
      nexus.security.randompassword: false

and it allows me to use automation to connect with nexus rm using admin/admin123 but that is problematic in some automations (like terraform with in-house provider connecting using those credentials) to change password.

I think there should be property named nexus.admin.password which would setup password to given string.

I also noticed secret section of configuration and I suspect this could be used but I cannot find any documentation if that would solve my problem.