public static int getServerPriority(ServerProcedureInterface proc) {
    return proc.hasMetaTableRegion() ? 100 : 1;
  }
Return the priority for the given procedure. For now we only have two priorities, 100 for
server carrying meta, and 1 for others.
hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/MasterProcedureUtil.java