Fix Experimental build

The experimental build mode should not remove the build directory neither
update the local working copy. Unfortunately this features were brocken because
of typos in a comparisson where lower case and upper case modes were mixed.

CbmRoot_test.cmake

@@ -58,7 +58,7 @@ Else()
 EndIf()
 
 #If(${CBM_TEST_MODEL} MATCHES Nightly OR ${CBM_TEST_MODEL} MATCHES Weekly OR ${CBM_TEST_MODEL} MATCHES Profile)
-If(NOT ${_BuildType} MATCHES Experimental)
+If(NOT ${_BuildType} MATCHES EXPERIMENTAL)
 
   Find_Program(GCOV_COMMAND gcov)
   If(GCOV_COMMAND)
@@ -89,7 +89,7 @@ If(DEFINED ENV{CTEST_END_TIME_LIMIT})
   message(STATUS " End time for the ctest test runs set to ${stop_time}")
 EndIf()
 
-If(NOT ${_BuildType} MATCHES Experimental)
+If(NOT ${_BuildType} MATCHES EXPERIMENTAL)
   Ctest_Update(SOURCE "${CTEST_SOURCE_DIRECTORY}")
 EndIf()