Low: mcp: set environment variables which the cluster-glue module needs.

The reason which needs each environment variable.

 1. LC_ALL
  discussed here:
  http://www.gossamer-threads.com/lists/linuxha/pacemaker/84024

 2. HA_LOGFACILITY
  discussed here:
  http://www.gossamer-threads.com/lists/linuxha/pacemaker/84026

 3. HA_LOGD
  - pacemaker-1.1 : https://github.com/ClusterLabs/pacemaker/commit/1b7859d (the latest devel)
  - glue : 54ec848c43
  - RHEL6.3

  If plugin calls ha_log.sh, "logd is not running" will be outputted to a standard error output.
  That is, 'plugin gethosts' has the potential to output "logd is ..." in addition to value of *hostlist* parameter.

  I added "ha_log.sh notice ..." to libvirt plugin on trial, and run it.

    ```
    $ diff -urN -U7 /usr/lib64/stonith/plugins/external/libvirt /tmp/libvirt
    --- /usr/lib64/stonith/plugins/external/libvirt	2012-12-17 09:56:37.000000000 +0900
    +++ /tmp/libvirt	2013-02-06 15:54:13.341415301 +0900
    @@ -208,14 +208,16 @@
     unset SSH_AUTH_SOCK
     
     # support , as a separator as well
     hostlist=`echo $hostlist| sed -e 's/,/ /g'`
     
     reset_method=${reset_method:-"power_cycle"}
     
    +ha_log.sh notice "TEST LOG"
    +
     case $1 in
         gethosts)
         hostnames=`echo $hostlist|sed -e 's/:[^ ]*//g'`
         for h in $hostnames
         do
             echo $h
         done
    $
    ```

  1. when I don't set environment variable HA_LOGD.

     ```
     $ ssh `hostname` 'export hostlist=HOST1; export PATH=/usr/share/cluster-glue:$PATH; /tmp/libvirt gethosts'
     logd is not runningHOST1
     ```

  2. when I set environment variable HA_LOGD=no.

     ```
     $ ssh `hostname` 'export hostlist=HOST1; export PATH=/usr/share/cluster-glue:$PATH; export HA_LOGD=no; /tmp/libvirt gethosts'
     HOST1
     ```
     http://www.gossamer-threads.com/lists/linuxha/pacemaker/79649