Github issue and pull request templates

(cherry picked from commit 494480239964fb677f16433b3172e22b5b4e5e87)
(cherry picked from commit a624b4523fb5da4929b299a35293833d1740ee03)
(cherry picked from commit 08e6294c803db4cedf5cdd38be383abff819283e)
(cherry picked from commit b6b5665158ca5c52ddd429c0feb85885aaa283d5)

issue_template.md

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+**Description**:
+
+**Current behaviour**: Tell us what happens
+
+**Expected behaviour**: Tell us what should happen instead
+
+**Steps to reproduce the problem**:
+
+1.
+2.
+3.
+
+**Branch(es)**: 335/6x
+
+**TC hash/commit**:
+
+**TDB version**:
+
+**Operating system**:
+
+
+[//]: # (This template is for problem reports, for other type of reports edit it accordingly)
+[//]: # (If this is a crash report, include the crashlog with https://gist.github.com/)