Stop Viper from leaking across many of the tests (now tests pass regardless of order tested)

helpers/path_test.go

@@ -431,6 +431,8 @@ func TestExists(t *testing.T) {
 }
 
 func TestAbsPathify(t *testing.T) {
+	defer viper.Reset()
+
 	type test struct {
 		inPath, workingDir, expected string
 	}
@@ -450,6 +452,7 @@ func TestAbsPathify(t *testing.T) {
 	}
 
 	for i, d := range data {
+		viper.Reset()
 		// todo see comment in AbsPathify
 		viper.Set("WorkingDir", d.workingDir)