Added new mca parameters to control collection of subsections in sigar
plugin.
Added new feature to collect process stats for the orcm process
as well as to collect the total process and the count of process
in different states
Implemented the feature to collect the process details of all the
processes spawned by orcmd and whose PIDs are stored in
orte_local_children
Removed some commented code and added a safe string copy in sigar
Fixing correct mca param name for collecting process stats
Also reused the timestamp for packing and sending instead of having
multiple samples
Fixing issues with freeing sampletime memory
Moved collection of memory, swap and cpu metrics into separate
function calls
Moved collection of load, disk, network and procstat data into
separate function calls for ease of understanding code.
Fixed a minor case related issue while logging total_threads
Added collection of disk access times -rTime, wTime & ioTime
sigar:
      - Fixed an issue with total disk r&w bytes;
      - Also added network stat collection
Sigar:
    - Removed a stray message for showing filesystem
    - Added collection of system uptime
Moving the ORCM error message from ORTE layer to ORCM
Merge branch 'vin_sigar_ph3'
fixing build break due to removal of the ORCM_ERR_PLACEHOLDER error
orun & osub cleanup
fixing a race condition in osub
Merge branch 'raj-jl-cleanup'