Update jctools from 1.2.1 to 3.1.0

patch by Berenguer Blasi; reviewed by Mick Semb Wever for CASSANDRA-16255

CHANGES.txt

@@ -1,4 +1,5 @@
 4.0-beta4
+ * Update jctools dependency to 3.1.0 (CASSANDRA-16255)
  * 'SSLEngine closed already' exception on failed outbound connection (CASSANDRA-16277)
  * Drain and/or shutdown might throw because of slow messaging service shutdown (CASSANDRA-16276)
  * Upgrade JNA to 5.6.0, dropping support for <=glibc-2.6 systems (CASSANDRA-16212)

build.xml

@@ -665,7 +665,7 @@
           <dependency groupId="com.github.rholder" artifactId="snowball-stemmer" version="1.3.0.581.1" />
           <dependency groupId="com.googlecode.concurrent-trees" artifactId="concurrent-trees" version="2.4.0" />
           <dependency groupId="com.github.ben-manes.caffeine" artifactId="caffeine" version="2.3.5" />
-          <dependency groupId="org.jctools" artifactId="jctools-core" version="1.2.1"/>
+          <dependency groupId="org.jctools" artifactId="jctools-core" version="3.1.0"/>
           <dependency groupId="org.ow2.asm" artifactId="asm" version="${asm.version}" />
           <dependency groupId="org.ow2.asm" artifactId="asm-tree" version="${asm.version}" />
           <dependency groupId="org.ow2.asm" artifactId="asm-commons" version="${asm.version}" />

lib/licenses/jctools-core-3.1.0.txt

@@ -1,5 +1,4 @@
-
-                                 Apache License
+Apache License
                            Version 2.0, January 2004
                         http://www.apache.org/licenses/
 
@@ -179,7 +178,7 @@
    APPENDIX: How to apply the Apache License to your work.
 
       To apply the Apache License to your work, attach the following
-      boilerplate notice, with the fields enclosed by brackets "[]"
+      boilerplate notice, with the fields enclosed by brackets "{}"
       replaced with your own identifying information. (Don't include
       the brackets!)  The text should be enclosed in the appropriate
       comment syntax for the file format. We also recommend that a
@@ -187,7 +186,7 @@
       same "printed page" as the copyright notice for easier
       identification within third-party archives.
 
-   Copyright [yyyy] [name of copyright owner]
+   Copyright {yyyy} {name of copyright owner}
 
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
@@ -200,3 +199,5 @@
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.
+
+