Update gRPC version. And shade google opencensus in agent.

apm-network/pom.xml

@@ -31,7 +31,7 @@
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <grpc.version>1.7.0</grpc.version>
+        <grpc.version>1.8.0</grpc.version>
         <compiler.version>1.6</compiler.version>
     </properties>
 

apm-sniffer/apm-agent-core/pom.xml

@@ -35,7 +35,7 @@
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <jetty.version>9.4.2.v20170220</jetty.version>
-        <grpc.version>1.7.0</grpc.version>
+        <grpc.version>1.8.0</grpc.version>
         <bytebuddy.version>1.7.6</bytebuddy.version>
 
         <shade.package>org.skywalking.apm.dependencies</shade.package>
@@ -50,6 +50,8 @@
         <shade.io.grpc.target>${shade.package}.${shade.io.grpc.source}</shade.io.grpc.target>
         <shade.io.netty.source>io.netty</shade.io.netty.source>
         <shade.io.netty.target>${shade.package}.${shade.io.netty.source}</shade.io.netty.target>
+        <shade.io.opencensus.source>io.opencensus</shade.io.opencensus.source>
+        <shade.io.opencensus.target>${shade.package}.${shade.io.opencensus.source}</shade.io.opencensus.target>
     </properties>
 
     <dependencies>
@@ -176,6 +178,10 @@
                                     <pattern>${shade.io.netty.source}</pattern>
                                     <shadedPattern>${shade.io.netty.target}</shadedPattern>
                                 </relocation>
+                                <relocation>
+                                    <pattern>${shade.io.opencensus.source}</pattern>
+                                    <shadedPattern>${shade.io.opencensus.target}</shadedPattern>
+                                </relocation>
                             </relocations>
                             <filters>
                                 <filter>