@Test
    void invalid_application_id_throws_http_400() {
        HttpResponse httpResponse = executeRequest(Method.POST, "", INVALID_RESOURCE_NAME);
        assertEquals(400, httpResponse.getStatus());
    }
Tests the implementation of the orchestrator Application API.

@author smorgrav
@author bjorncs
orchestrator/src/test/java/com/yahoo/vespa/orchestrator/resources/ApplicationSuspensionRequestHandlerTest.java