Don't use ServerProperties for configuring Wiremock server

The problem is that it is a Spring Boot app (really tiny one), so
it binds to server.* in the environment, if you try to use
the stock ServerProperties. We only need a subset of the features
so it's actually relatively easy to wrap it and use a delegate.

samples/wiremock-tomcat/src/test/java/com/example/WiremockImportContextPathApplicationTests.java

@@ -0,0 +1,35 @@
+package com.example;
+
+import static com.github.tomakehurst.wiremock.client.WireMock.aResponse;
+import static com.github.tomakehurst.wiremock.client.WireMock.get;
+import static com.github.tomakehurst.wiremock.client.WireMock.stubFor;
+import static com.github.tomakehurst.wiremock.client.WireMock.urlEqualTo;
+import static org.assertj.core.api.Assertions.assertThat;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.context.SpringBootTest.WebEnvironment;
+import org.springframework.cloud.contract.wiremock.AutoConfigureWireMock;
+import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.test.context.junit4.SpringRunner;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(properties = { "app.baseUrl=http://localhost:8080",
+		"server.context-path=/app" }, webEnvironment = WebEnvironment.NONE)
+@DirtiesContext
+@AutoConfigureWireMock
+public class WiremockImportContextPathApplicationTests {
+
+	@Autowired
+	private Service service;
+
+	@Test
+	public void contextLoads() throws Exception {
+		stubFor(get(urlEqualTo("/resource"))
+				.willReturn(aResponse().withHeader("Content-Type", "text/plain").withBody("Hello World!")));
+		assertThat(this.service.go()).isEqualTo("Hello World!");
+	}
+
+}