registry: add example demonstrating registry operations (#321)

Author: iamabhilaksh

examples/pom.xml

@@ -106,6 +106,16 @@
             <artifactId>iam-gcp</artifactId>
             <version>${project.version}</version>
         </dependency>
+        <dependency>
+            <groupId>com.salesforce.multicloudj</groupId>
+            <artifactId>registry-client</artifactId>
+            <version>${project.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>com.salesforce.multicloudj</groupId>
+            <artifactId>registry-gcp</artifactId>
+            <version>${project.version}</version>
+        </dependency>
         <dependency>
             <groupId>org.slf4j</groupId>
             <artifactId>slf4j-api</artifactId>