Describe the bug

The OCM share fails on share creating if the federated instance is not reachable.

Steps to reproduce

1. Establish the ScienceMesh connection between the ocis and ocisocm instances
2. Stop ocisocm
3. Try to share the folder f1 to ocisocm -> Error 500 "message": "error doing request: Post \"https://localhost:10200/ocm/shares\": dial tcp [::1]:10200: connect: connection refused"
4. Run ocisocm
5. Try to share the folder f1 to ocisocm -> Error 409 ` "message": "add grant: error: already exists: 892db45a-e62a-49c7-8492-1d1b06ac25c6/f1"

Expected behavior

A clear and concise description of what you expected to happen.

Actual behavior

A clear and concise description of what happened.

Setup

Please describe how you started the server and provide a list of relevant environment variables or configuration files.

OCIS_XXX=somevalue
OCIS_YYY=somevalue
PROXY_XXX=somevalue

Additional context

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