[skara] RFR: Rename skara plugins to improve IDE compatibility [v2]

[Robin Westberg]

> Improve IDE support for the latest skara gradle plugin structure.

Robin Westberg has updated the pull request incrementally with one additional commit since the last revision:

  Also rename directories

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Changes:
  - all: https://git.openjdk.java.net/skara/pull/1012/files
  - new: https://git.openjdk.java.net/skara/pull/1012/files/c6f33c96..ed505203

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=skara&pr=1012&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=skara&pr=1012&range=00-01

  Stats: 5 lines in 22 files changed: 0 ins; 0 del; 5 mod
  Patch: https://git.openjdk.java.net/skara/pull/1012.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/1012/head:pull/1012

PR: https://git.openjdk.java.net/skara/pull/1012