Moved plugins version to maven property
Moved plugins version to maven property

thushara35/carbon-apimgt,kasun32/carbon-apimgt,udarakr/carbon-apimgt,rasika90/carbon-apimgt,rasika90/carbon-apimgt,rasika90/carbon-apimgt,kasun32/carbon-apimgt,wso2/carbon-apimgt-everywhere,thushara35/carbon-apimgt,kasun32/carbon-apimgt,thushara35/carbon-apimgt,rasika90/carbon-apimgt,thushara35/carbon-apimgt,kasun32/carbon-apimgt,udarakr/carbon-apimgt,udarakr/carbon-apimgt,udarakr/carbon-apimgt