[Port dspace-7_x] Show error message from the password validation response

src/app/profile-page/profile-page.component.ts

@@ -161,7 +161,7 @@
         } else {
           this.notificationsService.error(
             this.translate.instant(this.PASSWORD_NOTIFICATIONS_PREFIX + 'error.title'),
-            this.translate.instant(this.PASSWORD_NOTIFICATIONS_PREFIX + 'error.change-failed')
+            this.getPasswordErrorMessage(response)
           );
         }
       });
@@ -199,4 +199,18 @@
     return this.isResearcherProfileEnabled$.asObservable();
   }
 
+  /**
+   * Returns an error message from a password validation request with a specific reason or
+   * a default message without specific reason.
+   * @param response from the validation password patch request.
+   */
+  getPasswordErrorMessage(response) {
+    if (response.hasFailed && isNotEmpty(response.errorMessage)) {
+      // Response has a specific error message. Show this message in the error notification.
+      return this.translate.instant(response.errorMessage);
+    }
+    // Show default error message notification.
+    return this.translate.instant(this.PASSWORD_NOTIFICATIONS_PREFIX + 'error.change-failed');
+  }
+
 }