package openjdk-7-jre-headless (not installed) failed to install/upgrade: trying to overwrite shared '/etc/java-7-openjdk/management/jmxremote.password', which is different from other instances of package openjdk-7-jre-headless:amd64

[xor]

had a problem trying to run arduino installed with apt-get and and tried to remove my openjdk, but while removing, got this failure.

Additional info:
I know that at some point I followed some strange steps to get webex video conferencing to work on Ubuntu and it required me to install a jdk in a very particular way. I no longer need webex because our remote work software has been chosen to be Google Hangouts, so I am now trying to get back to a standard installation of the JDK.

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: openjdk-7-jre-headless (not installed)
ProcVersionSignature: Ubuntu 3.13.0-35.62-generic 3.13.11.6
Uname: Linux 3.13.0-35-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.3
Architecture: amd64
Date: Sat Sep 20 22:33:16 2014
DpkgTerminalLog:
 Preparing to unpack .../openjdk-7-jre-headless_7u65-2.5.2-3~14.04_amd64.deb ...
 Unpacking openjdk-7-jre-headless:amd64 (7u65-2.5.2-3~14.04) ...
 dpkg: error processing archive /var/cache/apt/archives/openjdk-7-jre-headless_7u65-2.5.2-3~14.04_amd64.deb (--unpack):
  trying to overwrite shared '/etc/java-7-openjdk/management/jmxremote.password', which is different from other instances of package openjdk-7-jre-headless:amd64
DuplicateSignature: package:openjdk-7-jre-headless:(not installed):trying to overwrite shared '/etc/java-7-openjdk/management/jmxremote.password', which is different from other instances of package openjdk-7-jre-headless:amd64
ErrorMessage: trying to overwrite shared '/etc/java-7-openjdk/management/jmxremote.password', which is different from other instances of package openjdk-7-jre-headless:amd64
InstallationDate: Installed on 2014-03-17 (186 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140317)
SourcePackage: openjdk-7
Title: package openjdk-7-jre-headless (not installed) failed to install/upgrade: trying to overwrite shared '/etc/java-7-openjdk/management/jmxremote.password', which is different from other instances of package openjdk-7-jre-headless:amd64
UpgradeStatus: No upgrade log present (probably fresh install)
mtime.conffile..etc.java.7.openjdk.sound.properties: 2014-08-02T00:04:01