RFR: JDK-8277869: Maven POMs are using HTTP links where HTTPS is available

[Tobias Holenstein]

Replace `http` with `https` in xml files of IdealGraphVisualizer and LogCompilation.
Moreover, replace the old URL (./maven-v4_0_0.xsd) with of the suggested one (./maven-4.0.0.xsd) for `xsi:schemaLocation` in pom.xml.

Tested: IdealGraphVisualizer and LogCompilation build and run as expected.

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Commit messages:
 - replace http:// with https:// in IdealGraphVisualizer
 - LogCompilation use https and maven-4.0.0.xsd in pom.xml

Changes: https://git.openjdk.org/jdk/pull/17302/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=17302&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8277869
  Stats: 43 lines in 40 files changed: 1 ins; 1 del; 41 mod
  Patch: https://git.openjdk.org/jdk/pull/17302.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17302/head:pull/17302

PR: https://git.openjdk.org/jdk/pull/17302