gnu: Add java-jmh.

* gnu/packages/java.scm (java-jmh): New variable.

gnu: Add java-commons-math3.

* gnu/packages/java.scm (java-commons-math3): New variable.

gnu: java-hamcrest-core: Install all jars without version suffix.

* gnu/packages/java.scm (java-hamcrest-core)[arguments]: Install all three
jars and strip the version suffix.

gnu: Add java-jopt-simple.

* gnu/packages/java.scm (java-jopt-simple): New variable.

gnu: Add java-easymock.

* gnu/packages/java.scm (java-easymock): New variable.

gnu: Add java-objenesis.

* gnu/packages/java.scm (java-objenesis): New variable.

gnu: Add java-cglib.

* gnu/packages/java.scm (java-cglib): New variable.

gnu: Add java-asm.

* gnu/packages/java.scm (java-asm): New variable.

gnu: Add java-plexus-interpolation.

* gnu/packages/java.scm (java-plexus-interplation): New variable.

Co-authored-by: Ricardo Wurmus <rekado@elephly.net>

gnu: Add java-plexus-utils.

* gnu/packages/java.scm (java-plexus-utils): New variable.

Co-authored-by: Hartmut Goebel <h.goebel@crazy-compilers.com>

gnu: ant: Update to 1.9.9.

* gnu/packages/java.scm (ant): Update to 1.9.9.

Merge branch 'master' into core-updates

gnu: java-xz: Update to 1.6.

* gnu/packages/java.scm (java-xz): Update to 1.6.

gnu: icedtea-8: Do not embed build time.

* gnu/packages/java.scm (icedtea-8)[source]: Modify snippet to erase the
embedded build time.

gnu: Remove icedtea-6.

* gnu/packages/java.scm (icedtea-6): Remove variable.
(icedtea-7): Do not inherit from icedtea-6.

gnu: icedtea-6: Modify certificate import to not fail for icedtea-8.

Co-authored-by: Roel Janssen <roel@gnu.org>

* gnu/packages/java.scm (icedtea-6)[arguments]: Do not fail install-keystore
phase when attempting to import unsupported certificate types.  Also ensure
that the keystore is able to be written to before copying it.
(icedtea-8)[arguments]: Restore "install-keystore" phase.

Merge branch 'master' into python-tests

Merge remote-tracking branch 'origin/master' into core-updates

gnu: icedtea-7: Update to 2.6.9 [security fixes].

Fixes CVE-2016-{2183,5546,5547,5548,5549,5552} and
CVE-2017-{3231,3241,3252,3253,3260,3261,3272,3289}.

* gnu/packages/java.scm (icedtea-7): Update to 2.6.9.

Merge branch 'master' into python-tests