Fix Autotools UI SWTBot tests

- force tests to be run in file order by requesting alphabetic order
  and renaming tests to they alphabetic equals file order
- fix configuration test which looks for C/C++ Build page from
  properties by looking for it in the properties search text box
- put configuration tests last in suite

Change-Id: I21b943c2a6691f9277bc8cc712684f2bc1fd2db4
Reviewed-on: https://git.eclipse.org/r/35767
Tested-by: Hudson CI
Reviewed-by: Marc Khouzam <marc.khouzam@ericsson.com>
Tested-by: Marc Khouzam <marc.khouzam@ericsson.com>