Use network id to choose deployement accounts

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Related Issue for this Merge Request

resolves #140 (closed)

Motivation and Context

accounts should be selected according to network ID and not according to initalMember.json file presence

Description of change

accounts are now selected according to network ID and not according to initalMember.json file presence

Other Info

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• My change requires a change to the documentation.
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• All new and existing tests passed.

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