remove libmythupnp Rtti and merge remnants of libmythservicecontracts into mythfrontend

[ulmus-scott]

@bennettpeter Rtti was unused, but the mythfrontend stuff still works (except that using port 6551 prevents mythfrontend from shutting down).

Checklist

• contribution does not duplicate one of our existing pull requests
• contribution is in a branch rebased against master
• code compiles successfully without errors
• code follows the MythTV Coding Standards
• documentation added/updated/removed where necessary
• commits are logically organised and have good commit messages

[bennettpeter]

@ulmus-scott I did a quick test of mythfrontend without this pull request and it did shut down successfully after I ran one service (http://localhost:6551/Frontend/GetActionList). Is there a special condition under which it does not shut down, or are you saying that this pull request causes it to not shut down?

[ulmus-scott]

@bennettpeter This pull request should not effect anything on port 6551.

To prevent proper shutdown:

1. Launch mythfrontend from a terminal.
2. Either:
   2.a. Open http://localhost:6551/MythFE/GetScreenShot or http://localhost:6551/MythFE/GetServDesc
   2.b. Open http://localhost:6551/MythFE/GetRemote or http://localhost:6551/MythFE/GetActionTest
   2.b.1. Sometimes I had to also press one of the buttons, but not when I tested again just now.
3. Return to the mythfrontend window and exit normally.
4. The window will disappear, but the process in the terminal is still running with the last log message being: "Shutting down UPnP client...". It will stay there until terminated with ^C^C.

Without accessing port 6551, the next log message occurs after about 1 second and "Exiting" about 2 seconds after that. The terminal then presents the command prompt.

[ulmus-scott]

From my post to mythtv-dev:

The use of any of the pages on port 6551 cause mythfrontend to hang indefinitely when closing.

It waits indefinitely somewhere in

mythtv/mythtv/libs/libmythbase/mthreadpool.cpp

Line 267 in 0475f03

void MThreadPool::Stop(void)

called from

mythtv/mythtv/libs/libmythupnp/httpserver.cpp

Line 176 in 0475f03

m_threadPool.Stop();

from

mythtv/mythtv/programs/mythfrontend/mediarenderer.cpp

Line 180 in 0475f03

delete m_pHttpServer;

from

mythtv/mythtv/programs/mythfrontend/mythfrontend.cpp

Line 335 in 0475f03

delete g_pUPnp;

[bennettpeter]

There was a similar problem of not shutting down because of a thread not terminated in mythbackend a couple of years ago. Somebody, I think maybe Stuart, fixed it.