yarn rmadmin help message contains reference to hadoop cli and JT

has option to specify a job tracker and the last line for general command line syntax had "bin/hadoop command [genericOptions] [commandOptions]"

ran "yarn rmadmin" to get usage:

RMAdmin
Usage: java RMAdmin
[-refreshQueues]
[-refreshNodes]
[-refreshUserToGroupsMappings]
[-refreshSuperUserGroupsConfiguration]
[-refreshAdminAcls]
[-refreshServiceAcl]
[-help [cmd]]

Generic options supported are
-conf <configuration file> specify an application configuration file
-D <property=value> use value for given property
-fs <local|namenode:port> specify a namenode
-jt <local|jobtracker:port> specify a job tracker
-files <comma separated list of files> specify comma separated files to be copied to the map reduce cluster
-libjars <comma separated list of jars> specify comma separated jar files to include in the classpath.
-archives <comma separated list of archives> specify comma separated archives to be unarchived on the compute machines.

The general command line syntax is
bin/hadoop command [genericOptions] [commandOptions]