Adding cache for dns #625

Job	Run time
build-and-push-image	2m 18s
component-tests (Test_01_BasicAlertTest)	5m 23s
component-tests (Test_02_AllAlertsFromMaliciousApp)	7m 36s
component-tests (Test_03_BasicLoadActivities)	9m 53s
component-tests (Test_05_MemoryLeak_10K_Alerts)	15m 15s
component-tests (Test_06_KillProcessInTheMiddle)	4m 42s
component-tests (Test_07_RuleBindingApplyTest)	2m 7s
component-tests (Test_08_ApplicationProfilePatching)	1m 59s
component-tests (Test_10_MalwareDetectionTest)	6m 5s
component-tests (Test_11_EndpointTest)	4m 13s
component-tests (Test_12_MergingProfilesTest)	6m 7s
component-tests (Test_13_MergingNetworkNeighborhoodTest)	7m 22s
	1h 13m 0s

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