<i18n dev> RFR: 8295000: java/util/Formatter/Basic test cleanup

[Justin Lu]

Issue: java/util/Formatter/Basic regression test emits lots of warning messages (~60). 

Fix: Made adjustments to Basic-X.java.template as the BasicXXX.java files where the errors originate from are generated from the template. 

Note: The reason why there is white space added (and already existing in the BasicXXX files) is due to how the template is generated.

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Commit messages:
 - Adjust template to reduce whitespace
 - Re-add modified BasicDateTime test contents removed by generated template
 - Adjust template to cleanup errors

Changes: https://git.openjdk.org/jdk/pull/10684/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10684&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8295000
  Stats: 312 lines in 20 files changed: 205 ins; 6 del; 101 mod
  Patch: https://git.openjdk.org/jdk/pull/10684.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10684/head:pull/10684

PR: https://git.openjdk.org/jdk/pull/10684