NIFI-11909 Cleared Password field after login

- Clearing the password in the login form when login fails or unable to verify access once authentication succeeds.

This closes #11909

Signed-off-by: David Handermann <exceptionfactory@apache.org>
(cherry picked from commit 97dfe2d)

nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-web/nifi-web-ui/src/main/webapp/js/nf/login/nf-login.js

@@ -127,6 +127,9 @@
                     $('#login-message-title').text('Unable to log in');
                     $('#login-message').text(accessStatus.message);
 
+                    // clear the password
+                    $('#password').val('');
+
                     // update visibility
                     $('#login-container').hide();
                     $('#login-submission-container').hide();
@@ -137,6 +140,9 @@
                 $('#login-message-title').text('Unable to log in');
                 $('#login-message').text(xhr.responseText);
 
+                // clear the password
+                $('#password').val('');
+
                 // update visibility
                 $('#login-container').hide();
                 $('#login-submission-container').hide();
@@ -149,6 +155,9 @@
                 dialogContent: nfCommon.escapeHtml(xhr.responseText)
             });
 
+            // clear the password
+            $('#password').val('');
+
             // update the form visibility
             $('#login-submission-container').show();
             $('#login-progress-container').hide();