fix(java-client): package org.apache.pegasus.utils does not exist w…

…hile building java client (apache#2187)

Fix apache#2188.

`idl/utils.thrift` was introduced before and has not been added into java client
to generate necessary source files which make workflow for building failed. It
should also be excluded from spotless check just like what have been done for
other thrift files, since the check would fail due to code style.

java-client/pom.xml

@@ -427,6 +427,7 @@
             <excludes>
               <exclude>src/main/java/org/apache/pegasus/apps/*</exclude>
               <exclude>src/main/java/org/apache/pegasus/replication/*</exclude>
+              <exclude>src/main/java/org/apache/pegasus/utils/*</exclude>
             </excludes>
             <googleJavaFormat>
               <version>1.7</version>
@@ -487,6 +488,7 @@
             <include>partition_split.thrift</include>
             <include>rrdb.thrift</include>
             <include>security.thrift</include>
+            <include>utils.thrift</include>
           </includes>
           <thriftExecutable>thrift</thriftExecutable>
           <outputDirectory>${project.basedir}/src/main/java</outputDirectory>