Generate hprof files for joverflow tests

Some of the junit tests in com.oracle.joverflow.test are currently ignored since they need hprof files for running. The affected tests are:

• ArrayDupTest.java
• StringDupTest.java
• VariousIssueTest.java
• VariousIssueTest2.java
• VariousIssueTest3.java
• VerifyConsistency.java
  Each of these tests have corresponding hprof generator programs in the examples package.

Do:

• Generate hprof files using the provided programs.
• Test that the currently ignored test cases works with the generated files (place them somewhere in src/test/resources and make sure that the tests can find the files).
• Check the sizes of the generated files.
• If the hprof files are of a reasonable size, check in the files and updated test cases.