Allow Parquet to build with Java 8

[asfimport]

We should ensure that Parquet can be built and all tests pass when using Java 8. Note that this will not change the default target bytecode version (still at Java 6).

Reporter: Thomas White / @tomwhite
Assignee: Thomas White / @tomwhite

PRs and other links:

• PR #77

_{Note: This issue was originally created as PARQUET-121. Please see the migration documentation for further details.}

[asfimport]

Thomas White / @tomwhite:
PR: https://github.com/apache/incubator-parquet-mr/pull/77

[asfimport]

Thomas White / @tomwhite:
Issue resolved by pull request 77
https://github.com/apache/incubator-parquet-mr/pull/77