Upgrade tomcat version to 8.5.31. (apache#1781)

Author: ralf0131

dependencies-bom/pom.xml

@@ -99,7 +99,7 @@
 
         <rs_api_version>2.0</rs_api_version>
         <resteasy_version>3.0.19.Final</resteasy_version>
-        <tomcat_embed_version>8.0.11</tomcat_embed_version>
+        <tomcat_embed_version>8.5.31</tomcat_embed_version>
         <!-- Log libs -->
         <slf4j_version>1.7.25</slf4j_version>
         <jcl_version>1.2</jcl_version>

dubbo-remoting/dubbo-remoting-http/pom.xml

@@ -49,10 +49,6 @@
             <groupId>org.apache.tomcat.embed</groupId>
             <artifactId>tomcat-embed-core</artifactId>
         </dependency>
-        <dependency>
-            <groupId>org.apache.tomcat.embed</groupId>
-            <artifactId>tomcat-embed-logging-juli</artifactId>
-        </dependency>
         <dependency>
             <groupId>org.apache.httpcomponents</groupId>
             <artifactId>fluent-hc</artifactId>