canister write and query test suite

[mleku]

write a test suite to make sure that the agent and canister access is working correctly

[mleku]

checklist:

• [x] feed relay random events
• [x] set up testcanister cleaning functionality
• [x] use relay response to ensure test passed
• [x] combine generating and feeding events in to one go

queries:

• [ ] set up badgerDB for query testing
• [ ] generate random queries
• [ ] feed queries to relay