The command line flag parsing and the HTTP header parsing for CSI secrets
incorrectly split at more than one '=' rune, making it impossible to use secrets
that included that rune.
Pass-through the `-secret` and `-parameter` flags to allow setting
parameters for the snapshot and overriding the secrets we've stored on
the CSI volume in the state store.
Listing snapshots was incorrectly returning nanoseconds instead of
seconds, and formatting of timestamps both list and create snapshot
was treating the timestamp as though it were nanoseconds instead of
seconds. This resulted in create timestamps always being displayed as
zero values.
Fix the unit conversion error in the command line and the incorrect
extraction in the CSI plugin client code. Beef up the unit tests to
make sure this code is actually exercised.
The RPC for listing volume snapshots requires a plugin ID. Update the
`volume snapshot list` command to find the specific plugin from the
provided prefix.
The AWS EBS CSI plugin was observed to return a EOF when we get to the end of
the paging for `ListSnapshots`, counter to specification. Handle this case
gracefully, including for `ListVolumes` (which EBS doesn't support but has
similar semantics).
Also fixes a timestamp formatting bug on `ListSnapshots`
