Add unit test for this specific case of loading from V1 archive

Added a tgz "frobnitz.v1.tgz" of the testdata folder frobnitz.v1
Verified that without the fix the unit test fails and re-produces
the issue.

Signed-off-by: Sidharth Surana <ssurana@vmware.com>

pkg/chart/loader/load_test.go

@@ -58,6 +58,19 @@ func TestLoadV1(t *testing.T) {
 	verifyDependenciesLock(t, c)
 }
 
+func TestLoadFileV1(t *testing.T) {
+	l, err := Loader("testdata/frobnitz.v1.tgz")
+	if err != nil {
+		t.Fatalf("Failed to load testdata: %s", err)
+	}
+	c, err := l.Load()
+	if err != nil {
+		t.Fatalf("Failed to load testdata: %s", err)
+	}
+	verifyDependencies(t, c)
+	verifyDependenciesLock(t, c)
+}
+
 func TestLoadFile(t *testing.T) {
 	l, err := Loader("testdata/frobnitz-1.2.3.tgz")
 	if err != nil {