Don't register with consul in bootstrap.

This allows the normal consul lifecycle to register and properly deregister when using config client discovery.

fixes gh-213

src/test/resources/etc/configserver.json

@@ -0,0 +1,7 @@
+{
+  "service": {
+    "name": "configserver",
+    "address": "127.0.0.1",
+    "port": 8888
+  }
+}