LUCENE-6998: fix a couple places to better detect truncated index files; improve corruption testing

Conflicts:
	lucene/core/src/java/org/apache/lucene/codecs/lucene60/Lucene60PointFormat.java
	lucene/core/src/java/org/apache/lucene/codecs/lucene60/Lucene60PointReader.java
	lucene/core/src/java/org/apache/lucene/codecs/lucene60/Lucene60PointWriter.java

Conflicts:
	lucene/CHANGES.txt
8 files changed
tree: 7e1c4ac62ba674ffd213082d12a9134d94f87337
  1. dev-tools/
  2. lucene/
  3. solr/
  4. .gitignore
  5. .hgignore
  6. build.xml
  7. README.txt