Upgrade Maven Surefire Plugin to 2.12

Surefire 2.12 now supports parallel forks, which can also be run
in runOrder="balanced", which is a nice feature for long-running
tests. Further improvements to selection of "groups" (JUnit categories)
are now also supported.


** Bug
   * [SUREFIRE-789] - Junit Category: Tests without category fail
with the message
"initializationError(org.junit.runner.manipulation.Filter)" when
groups is set and forkMode=always
   * [SUREFIRE-793] - JUnit47 provider reports incorrect time in the XML report
   * [SUREFIRE-800] - redirectTestOutputToFile is not taken into
account in all cases with JUnit47 provider
   * [SUREFIRE-804] - Testcase fails with forkMode=always and
useSystemClassLoader=false
   * [SUREFIRE-805] - Regression: surefire 2.11 seems to break
excludeGroups config with TestNG
   * [SUREFIRE-810] - Endorsed dirs mechanism not working
   * [SUREFIRE-812] - log4j classloader problem in 2.11 that is not
there in 2.10
   * [SUREFIRE-813] - Randomly wrong tests count and empty summary
files with JUnitProvider47 when forking the tests.
   * [SUREFIRE-818] - Ignored Tests in case of NullPointerException raised!
   * [SUREFIRE-822] - JUnit4RunListener doesn't handle apparently
'legal' junit descriptions


** Improvement
   * [SUREFIRE-803] - Multiple Failsafe executions - FAILURE in an
execution prevents successive from running.
   * [SUREFIRE-806] - Make ignoring of <includes> and <excludes> on
-Dtest=... optional (for multiple Surefire executions)
   * [SUREFIRE-820] - Documentation on how to use categories with
JUnit is missing (includes patch)

** New Feature
   * [SUREFIRE-537] - Reason for the Ignored/Skipped testcases is not reported
   * [SUREFIRE-799] - Allow test parallelisation when forkMode=always
   * [SUREFIRE-809] - Implement boolean expression to define test
group to be run.

Release Notes - Maven Surefire - Version 2.11



** Bug
   * [SUREFIRE-508] - cannot run GWTTestCases with surefire
   * [SUREFIRE-549] - TestNg provider does not run junit tests
correctly when forkMode=always
   * [SUREFIRE-746] - Other registered failing RunListeners cause
NullPointerException in ConcurrentReporterManager, falsely report of
"No tests were executed!":
   * [SUREFIRE-760] - mvn -Dtest=ClassName#methodName does not work
with parallel tests
   * [SUREFIRE-775] - ForkingRunListener throws ArrayIndexOutOfBoundsException
   * [SUREFIRE-777] - Wrong default name for Failsafe Report
   * [SUREFIRE-780] - Success claimed when jvm fails to launch
   * [SUREFIRE-782] - Wrong links on surefire-plugin page
   * [SUREFIRE-785] - Lots of newlines being strewn about in test output
   * [SUREFIRE-786] - JUnit @Category are not taken into account if
forkMode=always
   * [SUREFIRE-787] - Test fail cause message is badly displayed if
exception message conatins line feeds
   * [SUREFIRE-791] - JUnit47 provider reports incorrect elapsed time
on test failure.
   * [SUREFIRE-793] - JUnit47 provider reports incorrect time in the XML report
   * [SUREFIRE-801] - Classloading compatibility break with
forkMode=NEVER in 2.9 and 2.10


** Improvement
   * [SUREFIRE-518] - Do not generate empty ouput files when
redirectTestOutputToFile is enabled
   * [SUREFIRE-611] - surefire exit code should explicitly
distinguish between crashed and failed unit test(s)
   * [SUREFIRE-772] - [Report Goal] Skip Maven Failsafe Report

** New Feature
   * [SUREFIRE-656] - JUnit 4.8 @Category support
   * [SUREFIRE-795] - There should be a way to balance tests across threads

** Story
   * [SUREFIRE-784] - Surefire plugin cannot be debugged remotely by eclipse

** Task
   * [SUREFIRE-802] - Dcoument Surefire API changes


** Wish
   * [SUREFIRE-329] - Support for JUNIT extensions