Disk copy with reserved name prefix fails

[jonathan-greig]

Disks for some instances have a reserved name prefix e.g. aef- and attempting to create a disk snapshot with same prefix fails.

libcloudforensics should either avoid creating cloud resources with a reserved name prefix or at least provide an optional prefix argument for when this does occur.

[jonathan-greig]

A temp fix was to change

cloud-forensics-utils/libcloudforensics/providers/gcp/forensics.py

Line 89 in a71b13c

snapshot, created = disk_to_copy.Snapshot()

to

    snapshot, created = disk_to_copy.Snapshot(
        snapshot_name='fix-' + disk_to_copy.name)```