Update checksums to the officially-published ones from Oracle

attributes/default.rb

@@ -82,10 +82,13 @@
                                             "keytool", "native2ascii", "orbd", "pack200", "policytool", "rmic", "rmid", "rmiregistry",
                                             "schemagen", "serialver", "servertool", "tnameserv", "unpack200", "wsgen", "wsimport", "xjc" ]
 
+# Oracle doesn't seem to publish SHA256 checksums for Java releases, so we use MD5 instead.
+# Official checksums for the latest release can be found at http://www.oracle.com/technetwork/java/javase/downloads/java-se-binaries-checksum-1956892.html
+
 # x86_64
 default['java']['jdk']['7']['x86_64']['url'] = 'http://download.oracle.com/otn-pub/java/jdk/7u45-b18/jdk-7u45-linux-x64.tar.gz'
-default['java']['jdk']['7']['x86_64']['checksum'] = 'f2eae4d81c69dfa79d02466d1cb34db2b628815731ffc36e9b98f96f46f94b1a'
+default['java']['jdk']['7']['x86_64']['checksum'] = 'bea330fcbcff77d31878f21753e09b30'
 
 # i586
 default['java']['jdk']['7']['i586']['url'] = 'http://download.oracle.com/otn-pub/java/jdk/7u45-b18/jdk-7u45-linux-i586.tar.gz'
-default['java']['jdk']['7']['i586']['checksum'] = '4acbdc25d0acad7c765b65c13cda44150200c33507bfe8b5ce6cabcab3e016e0'
+default['java']['jdk']['7']['i586']['checksum'] = '66b47e77d963c5dd652f0c5d3b03cb52'