RFR: JDK-8278549: UNIX sun/font coding misses SUSE distro detection on recent distro SUSE 15

[Matthias Baesken]

Hello, please review this adjustment for recent SUSE Linux 15.
The font coding on UNIX, see setOsNameAndVersion in files 

src/java.desktop/unix/classes/sun/font/FcFontConfiguration.java
src/java.desktop/unix/classes/sun/font/MFontConfiguration.java

uses the file /etc/SuSE-release to detect SUSE Linux. However on SUSE Linux 15 this file does not exist any more.
Instead /etc/os-release can be used as a replacement on SLES12 and SLES15 :

Example content of /etc/os-release
NAME="SLES"
VERSION="12-SP2"
VERSION_ID="12.2"
PRETTY_NAME="SUSE Linux Enterprise Server 12 SP2"

There the name and version information is stored (NAME=... , VERSION_ID=...).

Additionally I noticed that there is some code duplication in FcFontConfiguration.java and MFontConfiguration.java , what do you think about moving this to some common place ?

Thanks, Matthias

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Commit messages:
 - JDK-8278549

Changes: https://git.openjdk.java.net/jdk/pull/6956/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=6956&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8278549
  Stats: 34 lines in 2 files changed: 32 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6956.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6956/head:pull/6956

PR: https://git.openjdk.java.net/jdk/pull/6956