Move Maven Contract Example to latest fabric-protos. (#331)

Signed-off-by: Ben Smith <benjsmi@us.ibm.com>

Author: benjsmi

examples/fabric-contract-example-maven/pom.xml

@@ -48,7 +48,7 @@
 		<dependency>
 			<groupId>org.hyperledger.fabric</groupId>
 			<artifactId>fabric-protos</artifactId>
-			<version>0.1.3</version>
+			<version>0.2.1</version>
 			<scope>compile</scope>
 		</dependency>