Adding cache for dns #627

Job	Run time
build-and-push-image	2m 17s
component-tests (Test_01_BasicAlertTest)	5m 41s
component-tests (Test_02_AllAlertsFromMaliciousApp)	8m 0s
component-tests (Test_03_BasicLoadActivities)	10m 4s
component-tests (Test_05_MemoryLeak_10K_Alerts)	15m 17s
component-tests (Test_06_KillProcessInTheMiddle)	4m 55s
component-tests (Test_07_RuleBindingApplyTest)	2m 25s
component-tests (Test_08_ApplicationProfilePatching)	2m 28s
component-tests (Test_10_MalwareDetectionTest)	6m 19s
component-tests (Test_11_EndpointTest)	4m 51s
component-tests (Test_12_MergingProfilesTest)	6m 37s
component-tests (Test_13_MergingNetworkNeighborhoodTest)	7m 29s
	1h 16m 23s

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