With restconf  RFC8040 tailing '/' in path leads to response 500

remove tailing '/'

in csit/tests/sdnc/resources/sdnc-properties.robot
${GRA_PRELOAD_NETWORK{color:#d4d4d4}}          /operations/GENERIC-RESOURCE-API:preload-network-topology-operation/
${GRA_PRELOAD_VFMODULE{color:#d4d4d4}}         /operations/GENERIC-RESOURCE-API:preload-vf-module-topology-operation/
${GRA_SERVICE_TOPOLOGY{color:#d4d4d4}}         /operations/GENERIC-RESOURCE-API:service-topology-operation/
${GRA_NETWORK_TOPOLOGY{color:#d4d4d4}}         /operations/GENERIC-RESOURCE-API:network-topology-operation/
${GRA_VNF_TOPOLOGY{color:#d4d4d4}}             /operations/GENERIC-RESOURCE-API:vnf-topology-operation/
${GRA_VFMODULE_TOPOLOGY{color:#d4d4d4}}        /operations/GENERIC-RESOURCE-API:vf-module-topology-operation/