Two features have the same name

There are two features that have the same name odl-openflowplugin-nxm-extensions, one in file features-openflowplugin-extension/src/main/features/features.xml, the other in file features-openflowplugin-extension_he/src/main/features/features.xml, their feature descriptor are completely the same.
The output of command feature:list | grep odl-openflowplugin-nxm is:
opendaylight-user@root>feature:list | grep odl-openflowplugin-nxm
odl-openflowplugin-nxm-extensions | 0.5.0-SNAPSHOT | x | openflowplugin-extension-0.5.0-SNAPSHOT | OpenDaylight :: Openflow Plugin :: Nicira Extensio
odl-openflowplugin-nxm-extensions | 0.5.0-SNAPSHOT | x | openflowplugin-extension-0.5.0-SNAPSHOT | OpenDaylight :: Openflow Plugin :: Nicira Extensio

which one will be installed when install odl-openflowplugin-nxm-extensions? so I think the one in features-openflowplugin-extension_he/src/main/features/features.xml whose feature name should be odl-openflowplugin-nxm-extensions-he.