changed ioutils to os #1170

Job	Run time
build-operator-image	9m 53s
int-tests (appframeworks1)	1h 9m 15s
int-tests (managerappframeworkc3)	3h 30m 50s
int-tests (managerappframeworkm4)	3h 31m 2s
int-tests (managersecret)	2h 4m 22s
int-tests (managersmartstore)	33m 16s
int-tests (managermc)	2h 58m 5s
int-tests (managercrcrud)	3h 17m 3s
int-tests (licensemanager)	2h 17m 27s
int-tests (managerdeletecr)	1h 27m 33s
	20h 58m 46s

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