Merge pull request #6929 from p3p/pr_issue_template

Add template for github issues

.github/issue_template.md

@@ -0,0 +1,7 @@
+### Expected behaviour
+
+### Actual behaviour
+
+### Steps to reproduce the behaviour
+
+#### please add your Configuration.h and Configuration_adv.h to a zip file and attach it to this issue