Sync no farmer

[arvidn]

Purpose:

As part of the patch to fix deep-reorgs, it was discovered that one of the tests would not trigger a reorg sync unless a new block was farmed. That's not the intention, so I added this test to ensure a normal, catch-up, sync can be triggered without a new farm being farmed.

In order to make the tests not take too long, I cherry-picked one of the commits from the deep-reorg PR to make the delay configurable, of how long to wait to receive 3 peers with the same peak. This is set to 1 seconds in the tests now.

There is no change in behavior, except the delay is configurable, still defaults to 30 seconds.

[wjblanke]

aok

[coveralls-official]

Pull Request Test Coverage Report for Build 6656572492

• 28 of 28 (100.0%) changed or added relevant lines in 3 files are covered.
• 88 unchanged lines in 9 files lost coverage.
• Overall coverage decreased (-0.09%) to 90.015%

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Files with Coverage Reduction	New Missed Lines	%
chia/server/node_discovery.py	1	78.01%
chia/timelord/timelord_launcher.py	1	69.77%
chia/full_node/full_node.py	2	86.1%
chia/full_node/weight_proof.py	2	90.81%
chia/timelord/timelord_api.py	2	87.85%
chia/server/server.py	4	81.45%
chia/full_node/full_node_api.py	7	77.59%
chia/timelord/timelord_state.py	20	69.47%
chia/timelord/timelord.py	49	73.85%

Totals
Change from base Build 6656422893:	-0.09%
Covered Lines:	93183
Relevant Lines:	103459

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💛 - Coveralls