165 xpn integration

See merge request !127

Resolve "Root issues and stage-out with SPANK"

At the end, stage-out in root installation was never implemented, so this merge request does it:
1. Stage-in (and waiting until copy happens, bool in trasfer_datasets)
2. Stage-out (and waiting until copy happens)
3. terminates adhoc fs
4. removes adhoc fs directory.

Some issues with needed environment variables solved, however LIBGKFS_HOSTS_FILE and GKFS_DAEMON and GKFS_CLIENT should be defined in the environment as they are installation dependant.

See merge request !126

Rnou/rootinstall fixes

This MR solves some issues with the installation on root scenarios (plugin / systemd). This also solves a CPU hog (100%) for the scheduler.

See merge request !125

# Conflicts:
#   src/scord/rpc_server.cpp

adhoc fs integration

Solves #162 
Solves #161

See merge request !124

rpc_server::scheduler_update() function

gekkofs.sh

Scord

Add ADM_transfer_status_create and ADM_transfer_status_destroy functions
to types.c

Update cargo version and thallium bug

Closes #160

See merge request !123

New release solving integration with slurm (0.3.3)

This MR adds /opt/slurm as it is found in an external Cluster. The normal paths doesn't work so we need to specify it manually.

See merge request !121