[ROSTESTS]

[ROSTESTS]
- Add a function "add_rostests_file" that calls both add_cd_file() and install() accordingly for regression tests.
  Use this function everywhere in rostests where add_cd_file() was used previously. This puts tests always in the right place on CD and also generates proper installation rules for them.
- Add a custom target "rostests_install" that performs an "install" on all rostests components.

This finally gives us a convenient and reliable way to copy all regression tests and their dependencies into a single directory (specified by the ROSTESTS_INSTALL environment variable).
Will be used on the WHS-Testbot to let it finally run each and every test.

CORE-12401
ONLINE-441

svn path=/trunk/; revision=73533