bash completion: Disable value lookups by default
bash completion: Disable value lookups by default

In some configurations the lookups can be quite slow, so disable
unless the user enables it.

Signed-off-by: Tony Asleson <1ef2d381aa56d512126ddaacc29e68136e4fdf55@redhat.com>

joehandzik/libstoragemgmt,lazy404/libstoragemgmt,libstorage/libstoragemgmt,lazy404/libstoragemgmt,tasleson/libstoragemgmt,cathay4t/libstoragemgmt,lazy404/libstoragemgmt,joehandzik/libstoragemgmt,libstorage/libstoragemgmt,jumitche/libstoragemgmt,tasleson/libstoragemgmt,HP-Scale-out-Storage/libstoragemgmt,cathay4t/libstoragemgmt,lazy404/libstoragemgmt,joehandzik/libstoragemgmt,jumitche/libstoragemgmt,libstorage/libstoragemgmt,tasleson/libstoragemgmt,libstorage/libstoragemgmt,jumitche/libstoragemgmt,jumitche/libstoragemgmt,tasleson/libstoragemgmt,jumitche/libstoragemgmt,cathay4t/libstoragemgmt,tasleson/libstoragemgmt,HP-Scale-out-Storage/libstoragemgmt,libstorage/libstoragemgmt,cathay4t/libstoragemgmt,joehandzik/libstoragemgmt,cathay4t/libstoragemgmt,HP-Scale-out-Storage/libstoragemgmt,HP-Scale-out-Storage/libstoragemgmt