Fix name of the invoked utility in mpath_set_friendly_names
Fix name of the invoked utility in mpath_set_friendly_names

The mpath configuration is done with the mpathconf tool.

rhinstaller/libblockdev,vpodzime/libblockdev,atodorov/libblockdev,vpodzime/libblockdev,rhinstaller/libblockdev,vpodzime/libblockdev,snbueno/libblockdev,dashea/libblockdev,snbueno/libblockdev,atodorov/libblockdev,atodorov/libblockdev,rhinstaller/libblockdev,dashea/libblockdev