grizzly-http-server: minor cleanup

Author: jam01

rule/grizzly-http-server/src/main/java/io/opentracing/contrib/specialagent/rule/grizzly/http/server/GizzlyHttpRequestPacketAdapter.java

@@ -3,10 +3,10 @@
 import io.opentracing.Span;
 import io.opentracing.SpanContext;
 import io.opentracing.Tracer;
+import io.opentracing.contrib.grizzly.http.server.GizzlyHttpRequestPacketAdapter;
 import io.opentracing.contrib.grizzly.http.server.GrizzlyServerSpanDecorator;
 import io.opentracing.propagation.Format;
 import io.opentracing.propagation.TextMap;
-import io.opentracing.tag.Tags;
 import io.opentracing.util.GlobalTracer;
 import org.glassfish.grizzly.filterchain.FilterChainContext;
 import org.glassfish.grizzly.filterchain.NextAction;

rule/grizzly-http-server/src/main/java/io/opentracing/contrib/specialagent/rule/grizzly/http/server/HttpServerFilterIntercept.java

@@ -2,18 +2,7 @@
 
 import io.opentracing.Scope;
 import io.opentracing.Span;
-import io.opentracing.SpanContext;
-import io.opentracing.Tracer;
-import io.opentracing.propagation.Format;
-import io.opentracing.propagation.TextMap;
-import io.opentracing.tag.Tags;
 import io.opentracing.util.GlobalTracer;
-import org.glassfish.grizzly.filterchain.FilterChainContext;
-import org.glassfish.grizzly.filterchain.NextAction;
-import org.glassfish.grizzly.http.HttpContent;
-import org.glassfish.grizzly.http.HttpHeader;
-import org.glassfish.grizzly.http.HttpRequestPacket;
-import org.glassfish.grizzly.http.HttpResponsePacket;
 
 public class WorkerFilterIntercept {
     public static Scope onHandleReadEnter(