[VOL-2235] Mocks and interfaces for rw-core

This update consists of mocks that are used by the rw-core
during unit testing.  It also includes interfaces used for unit
tests.

Change-Id: I20ca1455c358113c3aa897acc6355e0ddbc614b7
diff --git a/vendor/github.com/spf13/pflag/.travis.yml b/vendor/github.com/spf13/pflag/.travis.yml
new file mode 100644
index 0000000..f8a63b3
--- /dev/null
+++ b/vendor/github.com/spf13/pflag/.travis.yml
@@ -0,0 +1,21 @@
+sudo: false
+
+language: go
+
+go:
+  - 1.7.3
+  - 1.8.1
+  - tip
+
+matrix:
+  allow_failures:
+    - go: tip
+
+install:
+  - go get github.com/golang/lint/golint
+  - export PATH=$GOPATH/bin:$PATH
+  - go install ./...
+
+script:
+  - verify/all.sh -v
+  - go test ./...