RFR (S): JDK-8026154: [TESTBUG] runtime/CDSCompressedKPtrs/XShareAuto.java failed due to exception

[Mikhailo Seledtsov]

     Please review this change that fixes several tests.
     The issues addressed by this change have similar root cause, hence 
I have consolidated them under the umbrella of JDK-8026154 and hope to 
submit them as one change set.

     In detail, these changes are introduced to cover situation where 
mapping of the shared (CDS) archive into memory fails. Such situation is 
a random occurance, and is most likely due
     to ASLR (Adress Space Layout Randomization). ASLR is a  security 
feature managed by OS that randomizes the address where shared libraries 
are loaded; if the shared library is mapped
     into the space intended for the CDS archive, the mapping of the 
archive will fail. With this change, these tests take such situation 
into account.

     JBS: https://bugs.openjdk.java.net/browse/JDK-8026154
     Webrev: http://cr.openjdk.java.net/~mseledtsov/8026154/webrev.00/
     Testing:
         Exercises these tests on all standard platforms via JPRT -> PASS
         Local testing with number of iterations, especially on Windows 
where ASLR
             seems to be more aggressive