Remove / in download path

.gitlab-ci.yml

@@ -20,11 +20,11 @@ variables:
   DOCKER_IMAGE: carback1/golang-glide:1.9-d638096cef01
   REPOS_API: https://gitlab.com/api/v4/projects/elixxir%2F
   DL_URL_FRAG: jobs/artifacts/master/raw
-  SERVER_URL: $REPOS_API/server/$DL_URL_FRAG/server.linux64?job=build
-  CLIENT_URL: $REPOS_API/client/$DL_URL_FRAG/client.linux64?job=build
-  CHANNELBOT_URL: $REPOS_API/channelbot/$DL_URL_FRAG/channelbot.linux64?job=build
-  UDB_URL: $REPOS_API/user-discovery-bot/$DL_URL_FRAG/udb.linux64?job=build
-  GATEWAY_URL: $REPOS_API/gateway/$DL_URL_FRAG/gateway.linux64?job=build
+  SERVER_URL: ${REPOS_API}server/$DL_URL_FRAG/server.linux64?job=build
+  CLIENT_URL: ${REPOS_API}client/$DL_URL_FRAG/client.linux64?job=build
+  CHANNELBOT_URL: ${REPOS_API}channelbot/$DL_URL_FRAG/channelbot.linux64?job=build
+  UDB_URL: ${REPOS_API}user-discovery-bot/$DL_URL_FRAG/udb.linux64?job=build
+  GATEWAY_URL: ${REPOS_API}gateway/$DL_URL_FRAG/gateway.linux64?job=build
 
 before_script:
   ##