Resolve L2SS-218 "Move existing tooling to bootstrap dir"

This is the beginning.

Closes L2SS-218

bootstrap/etc/lofar20rc.sh

@@ -11,14 +11,6 @@
 export LOFAR20_DIR=${1:-${PWD}}
 echo "Setting LOFAR20_DIR=${LOFAR20_DIR}"
 
-# This needs to be modified for a development environment.
-# Example:  ~/lofar2.0/
-# The current setting is for a production environment.
-export TANGO_SKA_LOCAL_DIR=${LOFAR20_DIR}
-
-export TANGO_SKA_CONTAINER_DIR=${LOFAR20_DIR}/ska-docker/
-export TANGO_SKA_CONTAINER_MOUNT=${TANGO_SKA_LOCAL_DIR}:${TANGO_SKA_CONTAINER_DIR}:ro
-
 
 # This needs to be modified for a development environment.
 # Example:  ~/lofar2.0/tango
@@ -44,7 +36,7 @@ export TANGO_HOST=$(hostname):10000
 #
 
 # Provide the -v parameters for Docker and the -e ENV variables.
-export TANGO_CONTAINER_ENV="-e TANGO_SKA_CONTAINER_DIR=${TANGO_SKA_CONTAINER_DIR} -e TANGO_LOFAR_CONTAINER_DIR=${TANGO_LOFAR_CONTAINER_DIR}"
+export TANGO_CONTAINER_ENV="-e TANGO_LOFAR_CONTAINER_DIR=${TANGO_LOFAR_CONTAINER_DIR}"
 
 # Remove all LOFAR1 related environment modifications
 function remove_lofar()