Fix Continuous Integration

The external flesnet requires at least CMake 3.14.0. Check already in our CMakeLists.txt if this version is available, otherwise the test is done when building flesnet and the error is hidden in some log file. Use CMake from the FairSoft installation on the CI runner (lxir116 )where the CMake version is to old.

.gitlab-ci.yml

@@ -248,7 +248,7 @@ FileLicenceCheck:
     BASE_PATH: "/cvmfs/fairsoft.gsi.de/debian10"
     SIMPATH: "$BASE_PATH/fairsoft/$FAIRSOFT_VERSION"
     FAIRROOTPATH: "$BASE_PATH/fairroot/${FAIRROOT_VERSION}_fs_${FAIRSOFT_VERSION}"
-
+    EXTRA_PATH: "${SIMPATH}/bin"
 
 .macosx_tag: &macosx_tag
   stage: build