[skara] RFR: Initial version of census upgrade bot

[Robin Westberg]

Allows automated conversion of census.xml to the Skara format.

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Commit messages:
 - Remove mistakenly added file
 - Initial version of census upgrade bot

Changes: https://git.openjdk.java.net/skara/pull/1019/files
 Webrev: https://webrevs.openjdk.java.net/?repo=skara&pr=1019&range=00
  Stats: 382 lines in 5 files changed: 363 ins; 9 del; 10 mod
  Patch: https://git.openjdk.java.net/skara/pull/1019.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/1019/head:pull/1019

PR: https://git.openjdk.java.net/skara/pull/1019