rdscluster - fix arn generation (#1606)
rdscluster - fix arn generation (#1606)


ocampocj/cloud-custodian,alfredgamulo/cloud-custodian,ocampocj/cloud-custodian,thisisshi/cloud-custodian,ewbankkit/cloud-custodian,alfredgamulo/cloud-custodian,JohnTheodore/cloud-custodian,kapilt/cloud-custodian,kapilt/cloud-custodian,jimmyraywv/cloud-custodian,Sutto/cloud-custodian,ewbankkit/cloud-custodian,ocampocj/cloud-custodian,FireballDWF/cloud-custodian,FireballDWF/cloud-custodian,thisisshi/cloud-custodian,Sutto/cloud-custodian,Sutto/cloud-custodian,FireballDWF/cloud-custodian,alfredgamulo/cloud-custodian,capitalone/cloud-custodian,ewbankkit/cloud-custodian,capitalone/cloud-custodian,kapilt/cloud-custodian,ocampocj/cloud-custodian,taohungyang/cloud-custodian,scotwk/cloud-custodian,scotwk/cloud-custodian,thisisshi/cloud-custodian,taohungyang/cloud-custodian,ewbankkit/cloud-custodian,kapilt/cloud-custodian,taohungyang/cloud-custodian,capitalone/cloud-custodian,FireballDWF/cloud-custodian,Sutto/cloud-custodian,JohnTheodore/cloud-custodian,taohungyang/cloud-custodian,capitalone/cloud-custodian