Increased await() max wait time in RetainStoreTest to 20s to fix time…

[ZHANGSHUNLIN]

Increased await() max wait time in RetainStoreTest to 20s to fix timeouts.

[coveralls]

Pull Request Test Coverage Report for Build 13851683854

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 31 unchanged lines in 8 files lost coverage.
• Overall coverage decreased (-0.03%) to 63.348%

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Files with Coverage Reduction	New Missed Lines	%
com/baidu/bifromq/basecrdt/core/internal/CausalCRDTInflater.java	1	92.21%
com/baidu/bifromq/basekv/raft/RaftNode.java	2	82.96%
com/baidu/bifromq/basekv/raft/RaftNodeStateLeader.java	2	86.36%
com/baidu/bifromq/basescheduler/Batcher.java	3	84.21%
com/baidu/bifromq/dist/trie/TopicFilterIterator.java	3	69.08%
com/baidu/bifromq/basecluster/transport/TCPTransport.java	4	87.06%
com/baidu/bifromq/basekv/store/range/KVRangeFSM.java	6	77.56%
com/baidu/bifromq/basekv/raft/RaftNodeStateFollower.java	10	85.79%

Totals
Change from base Build 13762455102:	-0.03%
Covered Lines:	22774
Relevant Lines:	34830

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💛 - Coveralls