Move the scaladoc/javadoc mocking to fsqio plugin
Move the scaladoc/javadoc mocking to fsqio plugin

The scaladoc and javadoc is broken for some of these legacy
libraries but Pants requires those products to publish.

I should try and add a flag to turn off doc jars for publish,
but in the meantime I am just mocking those products to
unblock publish.

(sapling split of b87bc9b75ff7b61df9b9872c093153bdce3754b3)
foursquare/fsqio,foursquare/fsqio,foursquare/fsqio,foursquare/fsqio,foursquare/fsqio