Add NIST_ROLE mock to unit tests for role-based access validation

Author: Christian

src/test/java/com/ammann/entropy/resource/EntropyResourceTest.java

@@ -277,6 +277,7 @@ void triggerNist90BValidation_success_returns202() {
 
         SecurityContext securityContext = mock(SecurityContext.class);
         when(securityContext.getUserPrincipal()).thenReturn(null);
+        when(securityContext.isUserInRole("NIST_ROLE")).thenReturn(true);
 
         var response =
                 resource.triggerNIST90BValidation(
@@ -294,6 +295,7 @@ void triggerNist90BValidation_validationException_returns400() {
 
         SecurityContext securityContext = mock(SecurityContext.class);
         when(securityContext.getUserPrincipal()).thenReturn(null);
+        when(securityContext.isUserInRole("NIST_ROLE")).thenReturn(true);
 
         var response =
                 resource.triggerNIST90BValidation(