Rename kobman/tests folder to test and move under kobman/src/test

[EtricKombat-zz]

hyperledgerkochi#105

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Please explain the Issue / Feature Request here:

Please rename tests folder to test and move under src.
i.e currently kobman/tests should be kobman/src/test

refactor any dependent scripts/code to accommodate the change to the test scripts location.

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Please provide the necessary screenshots or documents regarding the issue: