fix(test): not a string

Author: zsistla

tests/integration/synthetics/test_happy_path_with_dt.php

@@ -62,7 +62,7 @@
         "nr.syntheticsJobId": "jjjjjjj-jjjj-1234-jjjj-jjjjjjjjjjjj",
         "nr.syntheticsMonitorId": "mmmmmmm-mmmm-1234-mmmm-mmmmmmmmmmmm",
         "externalDuration": "??",
-	"externalCallCount": "1",
+	"externalCallCount": 1,
         "guid": "??",
         "sampled": true,
         "priority": "??",