fix: remove old data

[MilGard91]

Context

When we update productPool data we fetch all the pools for a product and it data, if manager removes product from the pool by changing the values to 0, we don't update it since StakingViewer only returns only pools that have those values. Stale data never gets removed and then is used in calculation, that gives bigger capacities. Currently the only way to fix this is to remove cache file and refetch data.

Issue: #91

Changes proposed in this pull request

• Add an action to remove old data from the store so it's doesn't affect the result in the capacity and quote engines
• Convert type in the events from BigNumber to number for poolId

Test plan

• Add synchronizer tests that also include the test for the fix

Checklist

• [x] Rebased the base branch
• [x] Attached corresponding Github issue
• [x] Prefixed the name with the type of change (i.e. feat, chore, test)
• [x] Performed a self-review of my own code
• [x] Followed the style guidelines of this project
• [ ] Made corresponding changes to the documentation
• [x] Didn't generate new warnings
• [x] Didn't generate failures on existing tests
• [x] Added tests that prove my fix is effective or that my feature works

Review

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[roxdanila]

Can you also fill in the Context section explaining what the bug is?