The pluginlib recipe is updated to 1.9.23 to be in line with
https://github.com/ros/rosdistro/blob/ef3a7449d7f7ef6e691a5724ef6c485e75cfd4af/hydro/release.yaml.

The pluginlib recipe is updated to 1.9.22 to be in line with
https://github.com/ros/rosdistro/blob/4551e7c32d1b34984410b79bc0ec36afe3d3d245/hydro/release.yaml.

Signed-off-by: Stefan Herbrechtsmeier <stefan@herbrechtsmeier.net>

The previously applied patch is now incorporated in the hydro
release version.

Due to continuous URI modifications and no tests, the initial
commit of pluginlib contained invalid hashes. They are corrected
with this commit.

The pluginlib is used by the nodelet package.