RFR(M): 8199257: [TESTBUG] Open source VM testbase metaspace tests

[mikhailo]

http://cr.openjdk.java.net/~mseledtsov/8199257.01.open/index.html

Please review this change open sourcing VM metaspace tests. These tests 
have been used internally for a while, and are now being open sourced. 
Since this is not an creation of new tests, we would like to keep the 
changes during this review to an absolute required minimum. If you have 
any feedback on improvements of these tests, please file RFE(s) that 
will be addressed later in order of priority.


Here is what was done for this change:
   1. Moved the tests to OpenJDK repository to the specified directory 
location and structure.
   3. Updated Copyright statements accordingly.
   4. Updated "@library" statements accordingly.
   5. Updated TEST.groups and ProblemList.txt

   JBS:    https://bugs.openjdk.java.net/browse/JDK-8199257
   Webrev: http://cr.openjdk.java.net/~mseledtsov/8199257.01.open/index.html

   Testing:
       1. Ran the following tests on open-only repository and build, 
using "make run-test" (Linux-x64)
          vmTestbase_vm_metaspace, vmTestbase_largepages
          All PASS

       2. Automated multip-platform test system (usual 4 platforms):
          - vmTestbase_vm_metaspace, vmTestbase_largepages
          - hs-tier{1,2,3}
          All PASS

Thank you,
Misha