Slots can always be shifted when slot idle #2587

Job	Run time
Test elaborate	8m 5s
Generate test plan	17s
Build trace emulator (blastoise)	7m 59s
Build Emulators (blastoise)	7m 4s
Build trace emulator (machamp)	8m 1s
Build Emulators (machamp)	7m 59s
Build trace emulator (sandslash)	7m 58s
Build Emulators (sandslash)	8m 0s
Prepare for running testcases	1s
Run testcases	1s
Clean test reports [ON CANCELLED]	3s
Report CI result	1s
Request physical design report	1s
	55m 30s

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