all_test.go: only lint .yaml files

Avoid linting editor backup files in the data/reports directory.

Change-Id: I50306cb82460b92c9fad94b2f8f5e418d3153333
Reviewed-on: https://go-review.googlesource.com/c/vulndb/+/425093
TryBot-Result: Gopher Robot <[email protected]>
Reviewed-by: Damien Neil <[email protected]>
Reviewed-by: Julie Qiu <[email protected]>
Run-TryBot: Jonathan Amsterdam <[email protected]>

Author: jba

all_test.go

@@ -58,6 +58,9 @@ func TestLintReports(t *testing.T) {
 			if fi.IsDir() {
 				continue
 			}
+			if filepath.Ext(fi.Name()) != ".yaml" {
+				continue
+			}
 			fn := filepath.Join(dir, fi.Name())
 			if allFiles[fi.Name()] != "" {
 				t.Errorf("report appears in multiple locations: %v, %v", allFiles[fi.Name()], fn)