Add new issue template that helps users creating TCK challenges

Signed-off-by: Scott Marlow <smarlow@redhat.com>

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+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 '...'
+2. Click on '....'
+3. Scroll down to '....'
+4. See error
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Screenshots**
+If applicable, add screenshots to help explain your problem.
+
+**Desktop (please complete the following information):**
+ - OS: [e.g. iOS]
+ - Browser [e.g. chrome, safari]
+ - Version [e.g. 22]
+
+**Smartphone (please complete the following information):**
+ - Device: [e.g. iPhone6]
+ - OS: [e.g. iOS8.1]
+ - Browser [e.g. stock browser, safari]
+ - Version [e.g. 22]
+
+**Additional context**
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.

.github/ISSUE_TEMPLATE/tck_challenge.md

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+---
+name: Platform TCK Challenge
+about: Create TCK challenges in the appropriate SPEC project 
+title: 'Challenges for tests written specifically for Platform SPEC requirements belong here'
+labels: 'challenge'
+assignees: ''
+
+---
+
+**Follow the TCK Process document**
+Please follow the instructions in the TCK Process document (https://jakarta.ee/committees/specification/tckprocess) which may be updated occasionally.
+
+**Filing a Challenge**
+
+TCK Challenges MUST be filed via the specification project’s issue tracker using the label challenge and include the following information:
+
+1. The relevant specification version and section number(s).
+2. The coordinates of the challenged test(s).
+3. The exact TCK version.
+4. The implementation being tested, including name and company.
+5. A full description of why the test is invalid and what the correct behavior is believed to be.
+6. Any supporting material; debug logs, test output (.jtr file), test logs, run scripts, etc.
+
+For an example of an existing TCK challenge, see https://github.com/eclipse-ee4j/servlet-api/issues/378
+
+**Additional context**
+Add any other context about the problem here.
+
+** Note that the source for this page is contained in https://github.com/eclipse-ee4j/jakartaee-tck/tree/master/.github/ISSUE_TEMPLATE, pull requests are welcome to improve!  
+I'm also sharing this link so other projects see how they can specify an ISSUE_TEMPLATE for new issues. :-)