Wrong Error if User Enters "." or "-" Symbols in min.password length Field

[LeoNerdoG]

If user enters "." or "-" symbols in the min.password length field, Kapua reports an error that number is too large or should not be negative, etc. But "-" and "." should not be enterable anyway.

Testflow:

1. Login as kapua-sys
2. Go to Accounts, create an account (e.g. acco0)
3. Select acc0, go to Account settings, change password.min.lenght to -10 or 10.1 or 10-1
4. Observe the error

Expected behavior
"." and "-" symbols should not be enetarble in the field.

Screenshots

Version of Kapua
https://github.com/lorthirk/kapua/tree/feature-configurablePasswordLength

Type of deployment
[ ] Local Vagrant deployment
[x] Docker
[ ] Openshift (in its variants)
[ ] Others

Main component affected
[x] Console (in case of console please report info on which browser you encountered the problem)
[ ] REST API -> did not try rest api!!! -> please check!
[ ] Message Broker
[ ] - Others

[lorthirk]

At this time, given the effort required to fix this, I think a fix is not worth it.