bump kernel version to 5.2.6
bump kernel version to 5.2.6

wso2/carbon-analytics-common,ksdperera/carbon-analytics-common,ramindu90/carbon-analytics-common,lasanthaS/carbon-analytics-common,ksdperera/carbon-analytics-common,wso2/carbon-analytics-common,dilini-muthumala/carbon-analytics-common,ramindu90/carbon-analytics-common,dilini-muthumala/carbon-analytics-common,lasanthaS/carbon-analytics-common