pom cleaning; filter out jersey-core in hadoop2 to match hadoop3 and remove redunant version specifications

<!-- markdown --> Fixed awkward dependency issue that prevented site building. #### note specific to HBase 2.1.4 HBase 2.1.4 shipped with an early version of this fix that incorrectly altered the libraries included in our binary assembly for using Apache Hadoop 2.7 (the current build default Hadoop version for 2.1.z). For folks running out of the box against a Hadoop 2.7 cluster (or folks who skip the installation step of [replacing the bundled Hadoop libraries]( http://hbase.apache.org/book.html#hadoop) ) this will result in a failure at Region Server startup due to a missing class definition. e.g.: ``` 2019-03-27 09:02:05,779 ERROR [main] regionserver.HRegionServer: Failed construction RegionServer java.lang.NoClassDefFoundError: org/apache/htrace/SamplerBuilder at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:644) at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:628) at org.apache.hadoop.hdfs.DistributedFileSystem.initialize(DistributedFileSystem.java:149) at org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:2667) at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:93) at org.apache.hadoop.fs.FileSystem$Cache.getInternal(FileSystem.java:2701) at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:2683) at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:372) at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:171) at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:356) at org.apache.hadoop.fs.Path.getFileSystem(Path.java:295) at org.apache.hadoop.hbase.util.CommonFSUtils.getRootDir(CommonFSUtils.java:362) at org.apache.hadoop.hbase.util.CommonFSUtils.isValidWALRootDir(CommonFSUtils.java:411) at org.apache.hadoop.hbase.util.CommonFSUtils.getWALRootDir(CommonFSUtils.java:387) at org.apache.hadoop.hbase.regionserver.HRegionServer.initializeFileSystem(HRegionServer.java:704) at org.apache.hadoop.hbase.regionserver.HRegionServer.<init>(HRegionServer.java:613) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:423) at org.apache.hadoop.hbase.regionserver.HRegionServer.constructRegionServer(HRegionServer.java:3029) at org.apache.hadoop.hbase.regionserver.HRegionServerCommandLine.start(HRegionServerCommandLine.java:63) at org.apache.hadoop.hbase.regionserver.HRegionServerCommandLine.run(HRegionServerCommandLine.java:87) at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70) at org.apache.hadoop.hbase.util.ServerCommandLine.doMain(ServerCommandLine.java:149) at org.apache.hadoop.hbase.regionserver.HRegionServer.main(HRegionServer.java:3047) Caused by: java.lang.ClassNotFoundException: org.apache.htrace.SamplerBuilder at java.net.URLClassLoader.findClass(URLClassLoader.java:381) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ... 26 more ``` Workaround via any _one_ of the following: * If you are running against a Hadoop cluster that is 2.8+, ensure you replace the Hadoop libaries in the default binary assembly with those for your version. * If you are running against a Hadoop cluster that is 2.8+, build the binary assembly from the source release while specifying your Hadoop version. * If you are running against a Hadoop cluster that is a supported 2.7 release, ensure the `hadoop` executable is in the `PATH` seen at Region Server startup and that you are not using the `HBASE_DISABLE_HADOOP_CLASSPATH_LOOKUP` bypass. * For any supported Hadoop version, manually make the Apache HTrace artifact `htrace-core-3.1.0-incubating.jar` available to all Region Servers via the HBASE_CLASSPATH environment variable. * For any supported Hadoop version, manually make the Apache HTrace artifact `htrace-core-3.1.0-incubating.jar` available to all Region Servers by copying it into the directory `${HBASE_HOME}/lib/client-facing-thirdparty/`.