fix compile failed and the url tag of motan plugin is not correct

apm-sniffer/apm-agent-core/src/main/java/org/skywalking/apm/agent/core/context/trace/EntrySpan.java

@@ -53,7 +53,7 @@ public class EntrySpan extends AbstractTracingSpan {
     }
 
     @Override
-    public AbstractSpan setLayer(SpanLayer layer) {
+    public AbstractTracingSpan setLayer(SpanLayer layer) {
         if (stackDepth == currentMaxDepth) {
             return super.setLayer(layer);
         } else {
@@ -62,7 +62,7 @@ public class EntrySpan extends AbstractTracingSpan {
     }
 
     @Override
-    public AbstractSpan setComponent(Component component) {
+    public AbstractTracingSpan setComponent(Component component) {
         if (stackDepth == currentMaxDepth) {
             return super.setComponent(component);
         } else {
@@ -71,7 +71,7 @@ public class EntrySpan extends AbstractTracingSpan {
     }
 
     @Override
-    public AbstractSpan setComponent(String componentName) {
+    public AbstractTracingSpan setComponent(String componentName) {
         if (stackDepth == currentMaxDepth) {
             return super.setComponent(componentName);
         } else {

apm-sniffer/apm-agent-core/src/main/java/org/skywalking/apm/agent/core/context/trace/ExitSpan.java

@@ -72,7 +72,7 @@ public class ExitSpan extends AbstractTracingSpan {
     }
 
     @Override
-    public AbstractSpan setLayer(SpanLayer layer) {
+    public AbstractTracingSpan setLayer(SpanLayer layer) {
         if (stackDepth == 1) {
             return super.setLayer(layer);
         } else {
@@ -81,7 +81,7 @@ public class ExitSpan extends AbstractTracingSpan {
     }
 
     @Override
-    public AbstractSpan setComponent(Component component) {
+    public AbstractTracingSpan setComponent(Component component) {
         if (stackDepth == 1) {
             return super.setComponent(component);
         } else {
@@ -90,7 +90,7 @@ public class ExitSpan extends AbstractTracingSpan {
     }
 
     @Override
-    public AbstractSpan setComponent(String componentName) {
+    public AbstractTracingSpan setComponent(String componentName) {
         if (stackDepth == 1) {
             return super.setComponent(componentName);
         } else {

apm-sniffer/apm-sdk-plugin/motan-plugin/src/main/java/org/skywalking/apm/plugin/motan/MotanConsumerInterceptor.java

@@ -36,7 +36,7 @@ public class MotanConsumerInterceptor implements InstanceConstructorInterceptor,
         Request request = (Request)allArguments[0];
         if (url != null) {
             ContextCarrier contextCarrier = new ContextCarrier();
-            String remotePeer = url.getHost() + " :" + url.getPort();
+            String remotePeer = url.getHost() + ":" + url.getPort();
             AbstractSpan span = ContextManager.createExitSpan(generateOperationName(url, request), contextCarrier, remotePeer);
             span.setComponent(ComponentsDefine.MOTAN);
             Tags.URL.set(span, url.getIdentity());