Merge pull request #3611 from tsachiherman/tsachi/rollbackParticipationExpirationTest

## Summary

The state proof branch contained a change to `testExpirationAccounts`, changing the `partKeyValidityPeriod` from 10 to 150. This increase the duration of the test substantially, and (apparently) also causing the test to fail.

This PR rolls back that change.

## Test Plan

This is a test.

Author: tsachiherman

test/e2e-go/features/participation/participationExpiration_test.go

@@ -76,7 +76,7 @@ func testExpirationAccounts(t *testing.T, fixture *fixtures.RestClientFixture, f
 		_, currentRound := fixture.GetBalanceAndRound(richAccount)
 		// account adds part key
 		partKeyFirstValid := uint64(0)
-		partKeyValidityPeriod := uint64(150) // TODO: maybe increase?
+		partKeyValidityPeriod := uint64(10)
 		partKeyLastValid = currentRound + partKeyValidityPeriod
 		partkeyResponse, _, err := sClient.GenParticipationKeys(sAccount, partKeyFirstValid, partKeyLastValid, 0)
 		a.NoError(err)