bugfix: VLTCLT-21 allow multiple request contexts to check policies

[miniscruff]

@williamlardier I grabbed part of #411 so I can use it in S3C-6002, that is basically all.

[bert-e]

Hello miniscruff,

My role is to assist you with the merge of this
pull request. Please type @bert-e help to get information
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Status report is not available.

[bert-e]

Waiting for approval

The following approvals are needed before I can proceed with the merge:

• the author

• 2 peers

[williamlardier]

Hello @miniscruff , thanks for pinging me here! I just wanted to confirm if these changes will be applied with the required changes in Vault. Please refer to what changed in Vault2: https://github.com/scality/vault2/pull/76/files#diff-6928997f0457bd503f20041d30db8bdf726db88d707ef97a84d4aecacc35bb1bR92 / https://github.com/scality/vault2/pull/76/files#diff-dc43d538913b31432ccdbaeecb51b7b910e02b29278be6b5429e9406e6021141R480
By default we do not support array of request context params, so I decided to update Vault in the PoC to solve this. The changes are quite simple: we will only work with arrays, with backward compatibility to also support only one Request Context Parameters. Please feel free to grab some changes from there if needed, for vault 7.x!

[williamlardier]

😄
Might be needed to also bump the project version if we want to use it in Vault

[bert-e]

Conflict

A conflict has been raised during the update of
integration branch w/8.3/bugfix/VLTCLT-21/allow-multiple-request-contexts-for-check-policies with contents from w/8.2/bugfix/VLTCLT-21/allow-multiple-request-contexts-for-check-policies
and development/8.3.

Please resolve the conflict on the integration branch (w/8.3/bugfix/VLTCLT-21/allow-multiple-request-contexts-for-check-policies).

Here are the steps to resolve this conflict:

 $ git fetch
 $ git checkout w/8.3/bugfix/VLTCLT-21/allow-multiple-request-contexts-for-check-policies
 $ git pull  # or "git reset --hard origin/w/8.3/bugfix/VLTCLT-21/allow-multiple-request-contexts-for-check-policies"
 $ git merge origin/development/8.3
 $ # <intense conflict resolution>
 $ git commit
 $ git merge origin/w/8.2/bugfix/VLTCLT-21/allow-multiple-request-contexts-for-check-policies
 $ # <intense conflict resolution>
 $ git commit
 $ git push -u origin w/8.3/bugfix/VLTCLT-21/allow-multiple-request-contexts-for-check-policies

[bert-e]

Waiting for approval

The following approvals are needed before I can proceed with the merge:

• the author

• 2 peers

[miniscruff]

/approve

[bert-e]

In the queue

The changeset has received all authorizations and has been added to the
relevant queue(s). The queue(s) will be merged in the target development
branch(es) as soon as builds have passed.

The changeset will be merged in:

• ✔️ development/7.10

• ✔️ development/8.2

• ✔️ development/8.3

The following branches will NOT be impacted:

• development/6.4
• development/7.4

There is no action required on your side. You will be notified here once
the changeset has been merged. In the unlikely event that the changeset
fails permanently on the queue, a member of the admin team will
contact you to help resolve the matter.

IMPORTANT

Please do not attempt to modify this pull request.

• Any commit you add on the source branch will trigger a new cycle after the
  current queue is merged.
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If you need this pull request to be removed from the queue, please contact a
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The following options are set: approve

[bert-e]

I have successfully merged the changeset of this pull request
into targetted development branches:

• ✔️ development/7.10

• ✔️ development/8.2

• ✔️ development/8.3

The following branches have NOT changed:

• development/6.4
• development/7.4

Please check the status of the associated issue VLTCLT-21.

Goodbye miniscruff.