[Java] Move storage init to init and get event queue for tests #59

All 103 tests pass in 0s

103 tests ±0 103 ✔️ ±0 0s ⏱️ ±0s
  13 suites ±0     0 💤 ±0
  13 files ±0     0 ❌ ±0

Results for commit 07da73b. ± Comparison against earlier commit 123b633.