Bad Test in OrcColumnarRowSplitReaderTest

This is a development issue with, what looks like a buggy unit test.
 
I tried to build Flink with a clean copy of the repository and I get:
 
```
[INFO] Results:
[INFO]
[ERROR] Failures:
[ERROR] OrcColumnarRowSplitReaderTest.testReadFileWithTypes:365
expected: "1969-12-31"
but was: "1970-01-01"
[INFO]
[ERROR] Tests run: 26, Failures: 1, Errors: 0, Skipped: 0
```
 
I see the test is testing Date data types with `new Date(562423)` which is 9 minutes and 22 seconds after the epoch time, which is 1970-01-01 UTC time, or when I run that on my laptop in CST timezone, I get `Wed Dec 31 18:09:22 CST 1969`.
 
I have a simple pull request ready which fixes this issue and uses the Java 8 LocalDate API instead which avoids time zones entirely.