Robotics Service Bus

Added tests {cpp,python,lisp}/{local,remote}-introspection.*

refs #1750

The new introspection tests work by starting a local-introspection and a
remote-introspection process in parallel and the remote-introspection
process collecting and verifying introspection events from the
local-introspection process.

local-introspection program for Java is missing for an initial complete
test.

• cpp/local-introspection.cpp: new file; C++ introspection sender
• cpp/CMakeLists.txt: added cpp/local-introspection.cpp
• python/local-introspection.py: new file; Python introspection sender
• lisp/common.lisp (toplevel): load rsb-introspection system
  (introspection-test-uri): new variable; base URI for introspection
  tests
• lisp/local-introspection.lisp: new file; Common Lisp introspection
  sender
• lisp/remote-introspection.lisp: new file; Common Lisp introspection
  receiver; also contains verification logic
• lisp/dump.lisp (filename->entry-point): added filename
  "remote-introspection" with entry point `remote-introspection-main',
  "local-introspection" with entry point `local-introspection-main'
• lisp/CMakeLists.txt (SCRIPTS): added {local,remote}-introspection.lisp
• test/integrationtest.py (tests): added "introspecton"
  (IntegrationTest.addIntrospectionPair): new method; add an
  introspection test case for a given pair of languages
  (run): added "introspection" test category