Add Azure Functions instrumentation

Author: trask

agent/instrumentation/build.gradle

@@ -15,6 +15,7 @@ dependencies {
     compile group: 'io.opentelemetry.auto.instrumentation', name: 'instrumentation-apache-httpasyncclient-4.0', version: instrumentationVersion
     compile group: 'io.opentelemetry.auto.instrumentation', name: 'instrumentation-apache-httpclient-2.0', version: instrumentationVersion
     compile group: 'io.opentelemetry.auto.instrumentation', name: 'instrumentation-apache-httpclient-4.0', version: instrumentationVersion
+    compile group: 'io.opentelemetry.auto.instrumentation', name: 'instrumentation-azure-functions', version: instrumentationVersion
     compile group: 'io.opentelemetry.auto.instrumentation', name: 'instrumentation-cassandra-3.0', version: instrumentationVersion
     compile group: 'io.opentelemetry.auto.instrumentation', name: 'instrumentation-cassandra-4.0', version: instrumentationVersion
     compile group: 'io.opentelemetry.auto.instrumentation', name: 'instrumentation-grpc-1.5', version: instrumentationVersion