Standardize ISSUE_TEMPLATE.md

Author: Jeff Brateman

.github/ISSUE_TEMPLATE.md

@@ -0,0 +1,8 @@
+### General information
+
+* Environment: <!-- Is this issue in Sandbox or Production? -->
+* Language, language version, and OS: <!-- Example: Java 1.8.0_101-b13 on Ubuntu 16.10 -->
+
+### Issue description
+
+<!-- To help us quickly reproduce your issue, include as many details as possible, such as logs, steps to reproduce, and so on.  If the issue reports a new feature, follow the [user story](https://en.wikipedia.org/wiki/User_story) format to clearly describe the use case. -->