HaskellLexerTest.testInternalLexer runs out of memory on CI

[carymrobbins]

It looks like the JDK6 builds are failing in CI due to a mysterious error -

https://travis-ci.org/carymrobbins/intellij-haskforce/jobs/107356422

[junit] Testcase: com.haskforce.HaskellTestCase:testInternalLexer: Caused an ERROR [junit] Forked Java VM exited abnormally. Please note the time in the report does not reflect the time until the VM exit. [junit] junit.framework.AssertionFailedError: Forked Java VM exited abnormally. Please note the time in the report does not reflect the time until the VM exit.

This seems a bit odd as that test was passing just fine before. Even rebuilding existing builds which were successful yield the same error.

For now, I may need to just disable the JDK6 builds on CI.

[carymrobbins]

It seems that this actually affects both JDKs; albeit, somewhat intermittently. The culprit appears to be that the HaskellLexerTest.testInternalLexer test is causing travis to run out of memory, so I'll disable that test for now.