ctests: allow excluding patterns

This allows us to exclude matches of certain patterns in
invertedTests, ignoredTests, unreliableTests, and suspendedTests.

To use this new functionality, prefix "!" to the pattern.

This functionality serves as a workaround in some cases to not being
able to use advanced regular expression techniques, such as
"negative lookahead", with CMake's regular expression engine.

Output of "ctest -N" is unchanged by this commit.

This functionality will be used soon (see next commits).

Patch from Kornel Benko.

(cherry picked from commit 10cd5dd223)

development/autotests/ExportTests.cmake

@@ -97,10 +97,16 @@ macro(findexpr found testname listname rsublabel)
       endforeach()
       # remove doubles in sublabel
       list(REMOVE_DUPLICATES tmpsublabel)
+    else()
+      if (_itrx MATCHES "^!\(.*\)$")
+        set(_itr "^${CMAKE_MATCH_1}$")
+        set(_foundval 0)
       else()
         set(_itr "^${_itrx}$")
+        set(_foundval 1)
+      endif()
       if (${testname} MATCHES "${_itr}")
-        set(_found 1)
+        set(_found ${_foundval})
         break()
       endif()
     endif()