Add on_demand_backup_fileset.sh and iperf_test.sh

[stevenctong]

Description

Add scripts:

• on_demand_backup_fileset.sh - takes an on demand backup of a fileset
• invoke-filesetrestore.sh - multi-directory restore from one or more source-destination directories on either the same host or alternate host. Kicks off a single restore job
• iperf_test.sh - script to help run iPerf network benchmarks

Types of changes

What types of changes does your code introduce? Put an x in all the boxes that apply:

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

Go over all the following points, and put an x in all the boxes that apply. If you're unsure about any of these, don't hesitate to ask. We're here to help!

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTION document.
• I have updated the CHANGELOG file accordingly for the version that this merge modifies.
• I have added tests to cover my changes.
• All new and existing tests passed.

[thomas-merz]

Hi @stevenctong ,

if I had seen your PR earlier I wouldn't had to script this, too. 🤦‍♂️
But I've now a more elegant solution with more features that can use both auth-mechanisms:

• "user with a token that expire in at least 365 days"
• "service-account with a token that never expires"

And it can dynamically identify which filesets relate to the host that calls the script and backup them. Teaser:

# Take a Rubrik-Snapshot of some NFS-Mounts.
# Currently only those Mounts are relevant, which do end with a specific string.

[thomas-merz]

What do you @stevenctong want to achieve with your iperf scripts?
It looks like overkill for me, because a simple iperf3 -s on the Rubrik-Nodes and a simple for h in {1..4}; do iperf3 -c rubrik"$h" -some-parameters; done will be sufficient, too!?