Migrating grpc from 1.7.0 to 1.9.0 as it provides support for shaded netty jar (#50)

Author: keshavpeswani

core/pom.xml

@@ -32,7 +32,7 @@
 
       <dependency>
         <groupId>io.grpc</groupId>
-        <artifactId>grpc-netty</artifactId>
+        <artifactId>grpc-netty-shaded</artifactId>
       </dependency>
 
       <dependency>

core/src/main/java/com/expedia/www/haystack/client/dispatchers/clients/GRPCAgentClient.java

@@ -19,6 +19,7 @@
 import java.util.Arrays;
 import java.util.concurrent.TimeUnit;
 
+
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -36,8 +37,8 @@
 import com.expedia.www.haystack.client.metrics.Timer.Sample;
 
 import io.grpc.ManagedChannel;
-import io.grpc.netty.NegotiationType;
-import io.grpc.netty.NettyChannelBuilder;
+import io.grpc.netty.shaded.io.grpc.netty.NegotiationType;
+import io.grpc.netty.shaded.io.grpc.netty.NettyChannelBuilder;
 import io.grpc.stub.StreamObserver;
 
 public class GRPCAgentClient implements Client {

pom.xml

@@ -51,7 +51,7 @@
     <mockito.version>1.9.5</mockito.version>
     <awaitility.version>3.0.0</awaitility.version>
     <commonslang3.version>3.7</commonslang3.version>
-    <grpc.version>1.7.0</grpc.version>
+    <grpc.version>1.9.0</grpc.version>
     <jaxrs.version>2.1</jaxrs.version>
     <micrometer.version>1.0.1</micrometer.version>
 
@@ -115,7 +115,7 @@
       <!-- grpc -->
       <dependency>
         <groupId>io.grpc</groupId>
-        <artifactId>grpc-netty</artifactId>
+        <artifactId>grpc-netty-shaded</artifactId>
         <version>${grpc.version}</version>
       </dependency>
       <dependency>