[8u] PRF:8194154 :System property user.dir should not be changed

[hedongbo]

Hi,

Please review the backport of JDK-8194154 to 8u.
Bug: https://bugs.openjdk.java.net/browse/JDK-8194154
Original commit: http://hg.openjdk.java.net/jdk/jdk/rev/847a988152b8
8u webrev: https://cr.openjdk.java.net/~dongbohe/8194154/webrev.00/

Patch doesn't apply cleanly but is trivial, because JDK-8154231[1] and JDK-8155775[2] does not exist in 8,
and some copyright year conflicts.

Testing: checked that added test fails without the patch and passes with the patch, tested with tier1.

[1] https://bugs.openjdk.java.net/browse/JDK-8154231
[2] https://bugs.openjdk.java.net/browse/JDK-8155775

Thanks,
hedongbo