Update issue templates

Good for bug reports

Author: rayluo

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,32 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Steps to reproduce the behavior:
+1. Go to our [off-the-shelf samples](https://github.com/AzureAD/microsoft-authentication-library-for-python/tree/dev/sample) and pick one that is closest to your usage scenario. You should not need to modify the sample.
+2. Follow the description of the sample, typically at the beginning of it, to prepare a `config.json` containing your test configurations
+3. Run such sample, typically by `python sample.py config.json`
+4. See the error
+5. In this bug report, tell us the sample you choose, paste the content of the config.json with your test setup (which you can choose to skip your credentials, and/or mail it to our developer's email).
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**What you see instead**
+Paste the sample output, or add screenshots to help explain your problem.
+
+**The MSAL Python version you are using**
+Paste the output of this
+`python -c "import msal; print(msal.__version__)"`
+
+**Additional context**
+Add any other context about the problem here.