Description of problem:
Under "Access control" > HTPasswd page for any ROSA/OSD cluster, the link to adds multiple user i.e. "Add user" link is enabled when anyone of existing username , password  and confirm password fields are non empty. Probably this is not correct and the validation should be -
"Add user" link should be enabled only when

1. All existing username , password  and confirm password fields are non empty and filled with valid values.

"Add user" link should be disabled when

1. Anyone of existing username , password  and confirm password fields are empty
2. Anyone of existing username , password  and confirm password fields are filled with invalid values. 

How reproducible:

 Always

Steps to reproduce:

1. Launch OCM Staging.
2. Open a ROSA/OSD cluster.
3. Go to "Access control" tab > Identity providers > htpasswd.
4. Fill only username field and see the "add user" link behavior.
5. Fill password field with invaid value and see the "add user" link behavior.

Actual results:

"Add user" link enabled when

1. Anyone of existing username , password  and confirm password fields are empty
2. Anyone of existing username , password  and confirm password fields are filled with invalid values. 

This is wrong.

Expected results:

"Add user" link should be enabled only when

1. All existing username , password  and confirm password fields are non empty and filled with valid values.

"Add user" link should be disabled when

1. Anyone of existing username , password  and confirm password fields are empty
2. Anyone of existing username , password  and confirm password fields are filled with invalid values.