RFR: 8289255: update Eclipse .classpath and other configuration files [v3]

[Andy Goryachev]

> summary of changes:
> - fixed .classpath files
> - set UTF-8 encoding in the eclipse project config files

Andy Goryachev has updated the pull request incrementally with one additional commit since the last revision:

  8289255 remove javafx.swing/src/test/java as source folder

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

Changes:
  - all: https://git.openjdk.org/jfx/pull/804/files
  - new: https://git.openjdk.org/jfx/pull/804/files/9b6cb4c9..ecb43690

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jfx&pr=804&range=02
 - incr: https://webrevs.openjdk.org/?repo=jfx&pr=804&range=01-02

  Stats: 5 lines in 1 file changed: 0 ins; 5 del; 0 mod
  Patch: https://git.openjdk.org/jfx/pull/804.diff
  Fetch: git fetch https://git.openjdk.org/jfx pull/804/head:pull/804

PR: https://git.openjdk.org/jfx/pull/804