Update build to always remove the node_modules

Makefile

@@ -69,5 +69,6 @@ run-dev: ${BINARY}
 clean:
 	if [ -f ${BINARY} ] ; then rm ${BINARY} ; fi
 	cd ui && npm run clean
+	cd ui && rm -rf node_modules
 
 .PHONY: clean test jstest gotest run

circle.yml

@@ -13,6 +13,8 @@ dependencies:
         - git config --global url."git@github.com:".insteadOf "https://github.com/"
         - mkdir -p ${HOME}/.go_workspace/src/github.com/influxdata
         - ln -sf ${HOME}/chronograf ${HOME}/.go_workspace/src/github.com/influxdata
+        - "make clean":
+            pwd: ../.go_workspace/src/github.com/influxdata/chronograf
         - "make":
             pwd: ../.go_workspace/src/github.com/influxdata/chronograf