Move TestHddsClientUtils to hadoop-hdds/client

hadoop-ozone/client/src/test/java/org/apache/hadoop/ozone/client/TestHddsClientUtils.java tests hadoop-hdds/client/src/main/java/org/apache/hadoop/hdds/scm/client/HddsClientUtils.java, so it should be moved to {{hadoop-hdds/client/src/test/java/org/apache/hadoop/hdds/scm/client.

It also has a test case (testgetOmSocketAddress)) for OmUtils, which should be moved to hadoop-ozone/common/src/test/java/org/apache/hadoop/ozone/TestOmUtils.java.