FSSPEC params to workers

[fnattino]

This way works to pass FSSPEC config parameters to the container running the Jupyter server and the Dask scheduler, but not to the ones running the Dask workers:

JupyterDaskCloud2Cluster/run-jupyter.bsh

Lines 28 to 30 in 7011183

	export FSSPEC_DCACHE_API_URL="https://dcacheview.grid.surfsara.nl:22880/api/v1"
	export FSSPEC_DCACHE_WEBDAV_URL="https://webdav.grid.surfsara.nl:2880"
	export FSSPEC_DCACHE_TOKEN=${DCACHE_TOKEN}