Identity v3 Projects List (#163)

* Identity v3 Projects List

* Rename ToListQuery to ToProjectListQuery
diff --git a/openstack/identity/v3/projects/testing/requests_test.go b/openstack/identity/v3/projects/testing/requests_test.go
new file mode 100644
index 0000000..31730f9
--- /dev/null
+++ b/openstack/identity/v3/projects/testing/requests_test.go
@@ -0,0 +1,30 @@
+package testing
+
+import (
+	"testing"
+
+	"github.com/gophercloud/gophercloud/openstack/identity/v3/projects"
+	"github.com/gophercloud/gophercloud/pagination"
+	th "github.com/gophercloud/gophercloud/testhelper"
+	"github.com/gophercloud/gophercloud/testhelper/client"
+)
+
+func TestListProjects(t *testing.T) {
+	th.SetupHTTP()
+	defer th.TeardownHTTP()
+	HandleListProjectsSuccessfully(t)
+
+	count := 0
+	err := projects.List(client.ServiceClient(), nil).EachPage(func(page pagination.Page) (bool, error) {
+		count++
+
+		actual, err := projects.ExtractProjects(page)
+		th.AssertNoErr(t, err)
+
+		th.CheckDeepEquals(t, ExpectedProjectSlice, actual)
+
+		return true, nil
+	})
+	th.AssertNoErr(t, err)
+	th.CheckEquals(t, count, 1)
+}