Extend setupTask.sh with support for running task interactively in an xterm through gdb

Developed to help investigate LHCb#370 (closed)

If the user sets the environment variable INTERACTIVE_GDB_IN_XTERM then the task spawned by setupTask.sh will be started running through an interactive gdb session inside a newly spawned xterm.

MooreScripts/job/setupTask.sh

@@ -164,7 +164,7 @@ exec_gaudirun() {
     if [[ ! -z ${PRELOAD_SANITIZER_LIB-} ]]; then
         LD_PRELOAD=${PRELOAD_SANITIZER_LIB}
     #else
-	# We don't use tcmalloc as we suspect it's the cause of
+        # We don't use tcmalloc as we suspect it's the cause of
         # random crashes correlated between nodes.
         # LD_PRELOAD=libtcmalloc.so
     fi
@@ -191,6 +191,11 @@ exec_gaudirun() {
     cmd+=(
         setarch x86_64 --addr-no-randomize bash -c "LD_PRELOAD=${LD_PRELOAD}"' exec -a "$0" "$@"'
         ${UTGID}
+    )
+    if [[ ${PARTITION} == "TEST"* && ! -z ${INTERACTIVE_GDB_IN_XTERM-} ]]; then
+      cmd+=( xterm -geometry 180x50 -e gdb -ex run --args )
+    fi
+    cmd+=(
         ${executable}
         `which gaudirun.py`
         --application=$application