RFR: 8272914: Create hotspot:tier2 and hotspot:tier3 test groups [v4]

[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`.
> 
> Sample runs:
> 
> 
> TEST                                              TOTAL  PASS  FAIL ERROR   
> jtreg:test/hotspot/jtreg:tier2                      425   425     0     0   
> 
> real	11m45.244s
> user	433m48.960s
> sys	38m13.606s
> 
> 
> 
> TEST                                              TOTAL  PASS  FAIL ERROR   
> jtreg:test/hotspot/jtreg:tier3                       80    80     0     0   
> 
> real	35m19.031s
> user	418m45.607s
> sys	5m41.748s
> 
> 
> 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`

Aleksey Shipilev has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains five additional commits since the last revision:

 - Add newly emerged tier2_gc_epsilon to tier2 as well
 - Merge branch 'master' into JDK-8272914-hs-tier2-3
 - Cleaner test group definitions
 - Filter InvocationTests in tier3, leaving the existing group alone
 - 8272914: Create hotspot:tier2 and hotspot:tier3 test groups

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/5241/files
  - new: https://git.openjdk.java.net/jdk/pull/5241/files/832dcc3a..cc352547

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=5241&range=03
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=5241&range=02-03

  Stats: 10101 lines in 330 files changed: 5674 ins; 2103 del; 2324 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