RFR(XS) 6545321: jstatLineCounts4.sh has to be resilient to unexpected output

[Mattias Tobiasson]

Hi,
Could you please review this test fix. The current test is unstable and fails intermittently.

The test parses output from jstat.
It verifies number of header lines, data lines and total lines.
The test sometimes fails because there are unexpected debug output from the jvm, which means that total line count does not match.

The fix is to ignore total line count, and only verify header lines and data lines.
There are multiple tests with the same problem. All have been fixed, even if the bug only mentions one test.

bug:
https://bugs.openjdk.java.net/browse/JDK-6545321

webrev:
http://cr.openjdk.java.net/~ykantser/6545321/webrev.00/

Mattias