pylib: sphinx generation had a bug

just fix a typo
serveral fixes to the sphinx command generation

These modifications are necessary to include the command files
into other bigger rst documents without warnings:

- removed definition of a reference from each command file since
  it was causing a label duplicate warning as report below
  These label are generated automatically by sphinx anyway
- orphan directive is necessary to avoid the WARNING:
  document isn't included in any toctree

1.
commands/roll-list-host-storagemap.rst:4: WARNING: duplicate label
rocks-list-host-storagemap, other instance in
/root/code/img-storage-roll/BUILD/roll-img-storage-usersguide-6.2/commands/roll-list-host-storagemap.rst
adding sphinx 1.2 to foundation