Update issue templates (#58)

* Update issue templates

* Add label as well

.github/ISSUE_TEMPLATE/blue-green-bug-bash.md

@@ -0,0 +1,20 @@
+---
+name: Blue Green Bug Bash
+about: Issues found in blue-green strategy bug bash
+title: "[Blue-Green Bug Bash] "
+labels: 'blue-green-bug-bash'
+assignees: ajinkya599
+
+---
+
+Repro steps:
+- Add steps to repro the issue here
+- 
+
+Current behaviour:
+- What is the current behaviour?
+- 
+
+Expected behaviour:
+- What is the expected behaviour?
+-