Pass the node name for a host on which to create a workspace or
deploy/undeploy.

Add a new test for the creation of workspaces.

To help myself and the reviewer, here is a list of
"eNB_IPAddress"/"eNB1_IPAddress" parameters I copied from the various
pipelines:
- rfsim 4G eNB_IPAddress none => localhost
- rfsim 5g eNB_IPAddress none => localhost
- flexric eNB_IPAddress none => localhost
- l2sim 4g eNB_IPAddress none => localhost
- l2sim 4G eNB1_IPAddress 172.21.16.128 => obelix => localhost
- cluster image eNB_IPAddress poseidon
- ubuntu18 eNB_IPAddress obelix => obelix
- ubuntu-arm eNB_IPAddress gracehopper3-oai => gracehopper3-oai
- arm-cross eNB_IPAddress alambix => alambix
- lte-tdd eNB_IPAddress 172.21.18.45 => starsky
- lte-fdd eNB_IPAddress 172.21.18.46 => hutch
- lte-oaiue eNB_IPAddress 172.21.18.46 => hutch
- lte-oaiue eNB1_IPAddress 172.21.18.47 => carabe
- lte-tdd-2x2 eNB_IPAddress 172.21.16.128 => obelix
- nsa eNB_IPAddress 172.21.16.137 => nepes
- nsa eNB1_IPAddress 172.21.16.109 => ofqot
- sa-aerial eNB_IPAddress gracehopper1-oai => gracehopper1-oai
- aw2s eNB_IPAddress 172.21.16.124 => avra
- sabox eNB_IPAddress 172.21.16.109 => ofqot
- sa-oaiue eNB_IPAddress avra => avra
- sa-oaiue eNB1_IPAddress caracal => caracal
- cppcheck eNB_IPAddress 172.21.18.47 => carabe
- timing-phytest eNB_IPAddress caracal => caracal
- physim 4g eNB_IPAddress avra => avra
- physim 5g eNB_IPAddress avra => avra