gnu: Add java-powermock-core.

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

gnu: Add java-powermock-reflect.

* gnu/packages/java.scm (java-powermock-reflect): New variable.
* gnu/packages/patches/java-powermock-fix-java-files.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.

gnu: Add java-xerial-core.

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

gnu: Add java-lmax-disruptor.

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

gnu: Add java-bouncycastle-bcpkix.

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

gnu: Add java-bouncycastle-bcprov.

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

gnu: Add java-lz4.

* gnu/packages/java.scm (java-lz4): New variable.

gnu: Add java-mvel2.

* gnu/packages/java.scm (java-mvel2): New variable.

gnu: Add java-jnacl.

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

gnu: Add java-testng.

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

gnu: Add java-fest-assert.

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

gnu: Add java-fest-test.

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

gnu: Add java-fest-util.

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

gnu: Add java-jmock-legacy.

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

gnu: Add java-jmock-junit4.

* gnu/packages/java.scm (java-jmock-junit4): New variable.

gnu: Add java-jmock.

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

gnu: Add java-bsh.

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

gnu: Add java-jcommander.

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

gnu: java: Fix libjvm.so linkage problem in icedtea-7.

* gnu/packages/java.scm (icedtea-7): Add phase to create a symbolic link to
  libjvm.so.

gnu: Add java-jboss-javassist.

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