Added Bug issue template

.gitlab/issue_templates/Bug.md

+####Summary
+
+
+
+####Steps to reproduce
+
+
+
+####Example Project
+
+
+
+####What is the current bug behavior?
+
+
+
+####What is the expected correct behavior?
+
+
+
+####Relevant logs and/or screenshots
+
+
+
+####Possible fixes
+
+/label Bug
+/label Needs assignment