YARN-6117. SharedCacheManager does not start up. Contributed by Chris Trezzo.

(cherry picked from commit dc6ec9704829f180ce0e182c436fe1a435744c88)

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/pom.xml

@@ -214,6 +214,7 @@
             <exclude>src/main/resources/webapps/jobhistory/.keep</exclude>
             <exclude>src/main/resources/webapps/yarn/.keep</exclude>
             <exclude>src/main/resources/webapps/applicationhistory/.keep</exclude>
+            <exclude>src/main/resources/webapps/sharedcache/.keep</exclude>
             <exclude>src/main/resources/webapps/cluster/.keep</exclude>
             <exclude>src/main/resources/webapps/test/.keep</exclude>
             <exclude>src/main/resources/webapps/proxy/.keep</exclude>