RFR: 8272914: Create hotspot:tier2 and hotspot:tier3 test groups

[Aleksey Shipilev]

Currently, no tests run in `hotspot:tier2` and `hotspot:tier3` groups, yet some groups have the "tier2" and "tier3" in their names. As we move tests from `hotspot:tier1`, they need to land in higher tiers. Therefore, we need `hotspot:tier2` and `hotspot:tier3`.

I had to exclude `InvocationTests` from `tier3`, because they run for a very long time.

Sample runs:


TEST                                              TOTAL  PASS  FAIL ERROR   
jtreg:test/hotspot/jtreg:tier2                      383   383     0     0   

real	10m9.008s
user	418m16.348s
sys	37m16.874s



TEST                                              TOTAL  PASS  FAIL ERROR   
jtreg:test/hotspot/jtreg:tier3                       72    72     0     0   

real	6m51.729s
user	368m37.880s
sys	4m26.574s


These also hook up properly to global `tier2` and `tier3`.

Additional testing:
 - [x] Linux x86_64 fastdebug `hotspot:tier2`
 - [x] Linux x86_64 fastdebug `hotspot:tier3`

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Commit messages:
 - 8272914: Create hotspot:tier2 and hotspot:tier3 test groups

Changes: https://git.openjdk.java.net/jdk/pull/5241/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=5241&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8272914
  Stats: 13 lines in 1 file changed: 13 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5241.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5241/head:pull/5241

PR: https://git.openjdk.java.net/jdk/pull/5241