[11u] RFR 8237600: Test SunJSSEFIPSInit fails on Ubuntu

[Martin Balao]

Hi,

I'd like to propose a fix for 8237600 [1].

Webrev.00:

 * http://cr.openjdk.java.net/~mbalao/webrevs/8237600/8237600.webrev.00/

Change removes a hardcoded library path on the NSS configuration and
lets the system decide.

@Boris Ulasevich has confirmed that the patch fixes the test on Ubuntu
16.04.5 LTS and Ubuntu 18.04.3 LTS. I can confirm that the test
continues working on Fedora x86-64.

This change applies to 11u-only, as it fixes a test introduced by
8230923 [2] which is 11u-only.

Thanks,
Martin.-

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[1] - https://bugs.openjdk.java.net/browse/JDK-8237600
[2] - https://bugs.openjdk.java.net/browse/JDK-8230923