Added an option to bufferontent for WireMockRestServiceServer

fixes gh-860

spring-cloud-contract-wiremock/src/main/java/org/springframework/cloud/contract/wiremock/WireMockRestServiceServer.java

@@ -83,6 +83,8 @@ public final class WireMockRestServiceServer {
 
 	private String baseUrl = "";
 
+	private boolean bufferContent = false;
+
 	private MockRestServiceServerBuilder builder;
 
 	private List<String> locations = new ArrayList<String>();
@@ -116,6 +118,15 @@ public final class WireMockRestServiceServer {
 		return this;
 	}
 
+	/**
+	 * Flag to tell the server to buffer the contents of the response.
+	 * @return this
+	 */
+	public WireMockRestServiceServer bufferContent() {
+		this.bufferContent = true;
+		return this;
+	}
+
 	/**
 	 * If stub locations are given as a directory, then we search recursively in that
 	 * directory for files with this suffix. Default is ".json".
@@ -180,6 +191,9 @@ public final class WireMockRestServiceServer {
 		if (this.ignoreExpectOrder) {
 			this.builder.ignoreExpectOrder(true); // default is false
 		}
+		if (this.bufferContent) {
+			this.builder.bufferContent();
+		}
 		MockRestServiceServer server = this.builder.build();
 		List<StubMapping> mappings = new ArrayList<>();
 		for (String location : this.locations) {