Remove the dep tool installation from travis CI

Use the just built gosec to scan the source code.
Signed-off-by: Cosmin Cojocar <cosmin.cojocar@gmx.ch>

.travis.yml

@@ -6,13 +6,11 @@ go:
   - tip
 
 install:
-  - go get -u github.com/golang/dep/cmd/dep
   - go get -u golang.org/x/lint/golint
   - go get -u github.com/onsi/ginkgo/ginkgo
   - go get -u github.com/onsi/gomega
   - go get -u golang.org/x/crypto/ssh
   - go get -u github.com/lib/pq
-  - go get -u github.com/securego/gosec/cmd/gosec/...
   - go get -v -t ./...
   - export PATH=$PATH:$HOME/gopath/bin
   - export GO111MODULE=on

Makefile

@@ -8,11 +8,11 @@ CGO_ENABLED = 0
 default:
 	$(MAKE) build
 
-test: 
+test: build
 	test -z '$(FMT_CMD)'
 	go vet $(go list ./... | grep -v /vendor/)
 	golint -set_exit_status $(shell go list ./... | grep -v vendor)
-	gosec ./...
+	./$(BIN) ./...
 	ginkgo -r -v
 
 test-coverage: