RFR: 286: Add more info about CSR in the PR's first comment

[Guoxiong Li]

Hi all,

This patch adds a link to the csr in the PR's first comment under **Issue**.
And the corresponding test is added.

Thanks for taking the time to review.

Best Regards,
-- Guoxiong

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Commit messages:
 - 286: Add more info about CSR in the PR's first comment

Changes: https://git.openjdk.java.net/skara/pull/1244/files
 Webrev: https://webrevs.openjdk.java.net/?repo=skara&pr=1244&range=00
  Issue: https://bugs.openjdk.java.net/browse/SKARA-286
  Stats: 69 lines in 2 files changed: 69 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/skara/pull/1244.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/1244/head:pull/1244

PR: https://git.openjdk.java.net/skara/pull/1244