RFR: 1393: PR bot fails on missing .jcheck/conf [v3]

[Zhao Song]

> SKARA-1393 describes a problem related with `.jcheck/conf` missing.
> 
> In this patch, when the problem happens, the author of this pull request will get instructions about how to solve this problem.

Zhao Song has refreshed the contents of this pull request, and previous commits have been removed. The incremental views will show differences compared to the previous content of the PR. The pull request contains one new commit since the last revision:

  need import network

-------------

Changes:
  - all: https://git.openjdk.org/skara/pull/1407/files
  - new: https://git.openjdk.org/skara/pull/1407/files/3b05cc5f..ced5742b

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=skara&pr=1407&range=02
 - incr: https://webrevs.openjdk.org/?repo=skara&pr=1407&range=01-02

  Stats: 326 lines in 6 files changed: 281 ins; 11 del; 34 mod
  Patch: https://git.openjdk.org/skara/pull/1407.diff
  Fetch: git fetch https://git.openjdk.org/skara pull/1407/head:pull/1407

PR: https://git.openjdk.org/skara/pull/1407