Add MR template

.gitlab/merge_request_templates/Default.md

+<!--- Provide a general summary of your changes in the Title above.  -->
+
+## Description
+<!--- Why is this change required? What problem does it solve?
+      If it fixes an issue, please link to the issue here. -->
+
+## How Has This Been Tested?
+<!--- Please describe in detail how you tested your changes.
+      Include details of your testing environment, tests ran to see how
+      your change affects other areas of the code, etc. -->
+
+## Relevant Documents (optional)
+<!-- Include any relevant screenshot, elogs, report, if appropriate. -->
+
+## Types of changes
+<!--- What types of changes does your code introduce? Leave lines that apply: -->
+
+- [ ] Bug fix (non-breaking change which fixes an issue)  
+- [ ] New feature (non-breaking change which adds functionality)  
+- [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)  
+- [ ] Docs (changes to the documentation)  
+- [ ] Style (formatting changes only, no code changes)  
+- [ ] Refactor (refactoring code with no functionality changes)  
+- [ ] Test (additional or refactored tests)  
+- [ ] Chore (non-code changes, e.g. comments, readme, grammar, etc...)  
+
+## Checklist:
+<!--- Go over all the following points, and check all that apply: -->
+
+- [ ] My code follows the code style of this project.  
+- [ ] My change requires a change to the documentation.  
+- [ ] I have updated the documentation accordingly.  
+- [ ] I added tests where appropriate.  
+
+## Reviewers
+<!--- Specify who is to review the changes -->
+- [ ] I need a review from:  
+- [ ] I have asked Controls for review
+