Fixed extremely rare race condition in DiscoveryManager (#2589) #4441

Job	Run time
run-determination	1s
package-name-prefix	2s
Create artifact Windows_X86-32	1m 18s
Create artifact Windows_X86-64	1m 13s
Create artifact Linux_X86-32	1m 8s
Create artifact Linux_X86-64	1m 14s
Create artifact Linux_ARMv6	1m 1s
Create artifact Linux_ARMv7	1m 4s
Create artifact Linux_ARM64	1m 9s
Create artifact macOS_64	1m 39s
Create artifact macOS_ARM64	1m 49s
Create artifact rpc-protocol-files	13s
Create artifact configuration-schema	13s
checksums	13s
	12m 17s

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