added some files/folders to be excluded from git packages (#9434)

.gitattributes

@@ -43,4 +43,15 @@ plugins/*/tests/UI/expected-screenshots/*.png filter=lfs diff=lfs merge=lfs
 *.WOFF2 binary
 
 # Custom for Visual Studio
-*.cs     diff=csharp
+*.cs     diff=csharp
\ No newline at end of file
+
+
+# Files excluded from git packages
+tests/ export-ignore
+.coveralls.yml export-ignore
+.gitignore export-ignore
+.gitattributes export-ignore
+.gitmodules export-ignore
+.phpstorm.meta.php export-ignore
+.scrutinizer.yml export-ignore
+.travis.yml export-ignore