Check if missing/modified/unused deps in vendor and fix errors (#1468)

* Check if missing deps in vendor

This will catch import from other repos. (maybe by auto-import)

* Remove github.com/smartystreets unused deps

* Remove github.com/boltdb/bolt unused dep

* Fetch github.com/go-xorm/core + sync gopkg.in/ldap.v2/ldap.go

* Auto-install govendor + reinstall github.com/boltdb/bolt needed by vendor/github.com/blevesearch/bleve/index/store/boltdb

* Update go-xorm/xorm to a5cb21 in vendor.json

* Use a custom repo for implementing change to bolt dep.

* Switching bolt to github.com/go-gitea/bolt

* Switching bolt to github.com/go-gitea/bolt (fork version)

* change the drone sign

Makefile

@@ -79,6 +79,13 @@ integrations: build
 test:
 	for PKG in $(PACKAGES); do go test -cover -coverprofile $$GOPATH/src/$$PKG/coverage.out $$PKG || exit 1; done;
 
+.PHONY: test-vendor
+test-vendor:
+	@hash govendor > /dev/null 2>&1; if [ $$? -ne 0 ]; then \
+		go get -u github.com/kardianos/govendor; \
+	fi
+	govendor status +outside +unused  || exit 1
+
 .PHONY: test-mysql
 test-mysql:
 	@echo "Not integrated yet!"