Clean up TestCommand paraphenalia

spring-boot-cli/samples/spock.groovy

@@ -0,0 +1,12 @@
+class HelloSpock extends Specification {
+    def "length of Spock's and his friends' names"() {
+        expect:
+        name.size() == length
+
+        where:
+        name     | length
+        "Spock"  | 5
+        "Kirk"   | 4
+        "Scotty" | 6
+    }
+}