bugtool: move plugins data from /etc/openvswitch to /usr/share/openvswitch

bugtool: move plugins data from /etc/openvswitch to /usr/share/openvswitch

This is in repsonse to the following rpmlint warnings:

 W: non-conffile-in-etc /etc/openvswitch/bugtool-plugins/system-configuration/openvswitch.xml
 W: non-conffile-in-etc /etc/openvswitch/bugtool-plugins/system-logs/openvswitch.xml
 W: non-conffile-in-etc /etc/openvswitch/bugtool-plugins/system-configuration.xml
 W: non-conffile-in-etc /etc/openvswitch/bugtool-plugins/network-status/openvswitch.xml
 W: non-conffile-in-etc /etc/openvswitch/bugtool-plugins/kernel-info/openvswitch.xml

The xenserver specfile still places them in /etc/xensource/bugtool since
that's a distro policy.  Of course, the rpmlint warnings are as well,
however, this seems like a more logical place for the bugtool plugins.

Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Ben Pfaff <blp@nicira.com>