remove duplicates keys

[k-okada]

c.f. ros-infrastructure/rosdep#520

some of rosdep keys is multiply defined, and that sometime confuse users.

• rename xdot in python.yaml to python-xdot, because xdot is already taken by ros package, at least until indigo http://wiki.ros.org/xdot

change xdot to python-xdot, this will break backward compatibility....

• pocketsphinx is already taken by ros package(http://wiki.ros.org/pocketsphinx)
  and that different from pocketsphinx system package,
  libshphinxbase is library and pocketsphinx installs some application binaries, so they are different too

this changes pocketsphinx key in base.yaml to pocketsphinx-bin, this also breaks compatibility, but that was added just a few month ago

ubuntu-14:~$ dpkg -L libsphinxbase1
/.
/usr
/usr/share
/usr/share/doc
/usr/share/doc/libsphinxbase1
/usr/share/doc/libsphinxbase1/copyright
/usr/share/doc/libsphinxbase1/changelog.Debian.gz
/usr/lib
/usr/lib/libsphinxbase.so.1.1.1
/usr/lib/libsphinxad.so.0.0.1
/usr/lib/libsphinxbase.so.1
/usr/lib/libsphinxad.so.0
ubuntu-14:~$ dpkg -L libpocketsphinx1/.
/usr
/usr/lib
/usr/lib/libpocketsphinx.so.1.1.0
/usr/share
/usr/share/doc
/usr/share/doc/libpocketsphinx1
/usr/share/doc/libpocketsphinx1/copyright
/usr/share/doc/libpocketsphinx1/changelog.Debian.gz
/usr/lib/libpocketsphinx.so.1


ubuntu-16:~$ dpkg -L pocketsphinx
/.
/usr
/usr/bin
/usr/bin/pocketsphinx_mdef_convert
/usr/bin/pocketsphinx_continuous
/usr/bin/pocketsphinx_batch
/usr/share
/usr/share/doc
/usr/share/doc/pocketsphinx
/usr/share/doc/pocketsphinx/copyright
/usr/share/man
/usr/share/man/man1
/usr/share/man/man1/pocketsphinx_batch.1.gz
/usr/share/man/man1/pocketsphinx_continuous.1.gz
/usr/share/man/man1/pocketsphinx_mdef_convert.1.gz
/usr/share/doc/pocketsphinx/changelog.Debian.gz

ubuntu-16:~$ dpkg -L libpocketsphinx3
/.
/usr
/usr/lib
/usr/lib/x86_64-linux-gnu
/usr/lib/x86_64-linux-gnu/libpocketsphinx.so.3.0.0
/usr/share
/usr/share/doc
/usr/share/doc/libpocketsphinx3
/usr/share/doc/libpocketsphinx3/copyright
/usr/share/doc/libpocketsphinx3/changelog.Debian.gz
/usr/lib/x86_64-linux-gnu/libpocketsphinx.so.3

• remove python-* in base.yaml, which already defined in python.yaml

This just to remove duplicates entry from base.yaml, no regressions.

[tfoote]

@k-okada Could you split this into 3 separate PRs?

The removal of straight duplicates is low impact. However the other two changes we should do a best effort to contact all known users as well as annouce the changes publicly and leave the PRs open for a review period to make sure that people have time to comment if it will significantly effect them.

Also the naming on pocketsphinx is different than we discussed in #14126 and the renames are causing at least one rule to be out of alphabetical order.

[k-okada]

@tfoote thanks for comment, split into 3 PRs #15258 #15259 #15260