netopeer2 CI

config UPDATE decrease backoff sleep to increase responsivity #606

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Job	Run time
Get git branch	1s
Release, gcc	1m 22s
Release, clang	1m 23s
Debug, gcc, with URL	2m 53s
Debug, clang	1m 16s
ASAN and UBSAN	1m 41s
DEB Package	4m 35s
	13m 11s