In Monasca document, some of the unit expression in the semantics for metrics are not consistent or missing

[Haruki Yamanashi]

In Monasca document, the unit expression in the metrics semantics is not consistent.

Currently, the expression "Kilobytes" and "Kbytes" are used. These expressions shold be unified to "Kbytes".
"Megabyte" and "megabytes" are also used. These expressions shold be unified to "Mbytes".

And also, for some metrics, unit descriptions are missing. These should be fixed.

Corresponding metrics and proposal are in the below.

A) Process Checks
 - process.io.read_kbytes (Kilobytes => Kbytes)
 - process.io.write_kbytes (Kilobytes => Kbytes)
 - process.mem.real_mbytes (in megabytes => in Mbytes)
 - process.mem.rss_mbytes (in megabytes => in Mbytes)
 - process.mem.vsz_mbytes (in megabytes => in Mbytes)

Corresponding part of the document is the below.
https://github.com/stackforge/monasca-agent/blob/master/docs/Plugins.md#process-checks

B) System Checks
 - mem.free_mb (Megabytes => Mbytes)
 - mem.swap_free_mb (Megabytes => Mbytes)
 - mem.swap_total_mb (Megabytes => Mbytes)
 - mem.swap_used_mb (Megabytes => Mbytes)
 - mem.total_mb (megabytes => Mbytes)
 - mem.usable_mb (megabytes => Mbytes)

 - disk.total_space_mb (disk space => disk space in Mbytes)
 - disk.total_used_space_mb (disk space => disk space in Mbytes)
 - mem.used_buffers (Number of buffers => Number of buffers in Mbytes)
 - mem.used_cached (Memory => Mbytes of memory)
 - mem.used_shared (Memory => Mbytes of memory)

 - monasca.emit_time_sec (Amount of time => Amount of time in seconds)
 - monasca.collection_time_sec (Amount of time => Amount of time in seconds)

Corresponding part of the document is the below.
https://github.com/stackforge/monasca-agent/blob/master/docs/Plugins.md#system-metrics

C) Http Endpoint Checks
 - http_response_time (The response time => The response time in seconds)

Corresponding part of the document is the below.
https://github.com/stackforge/monasca-agent/blob/master/docs/Plugins.md#http-endpoint-checks

[Allan G (greental)]

agreed it's a problem, will you be able to fix this ?

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/225032

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/225032
Committed: https://git.openstack.org/cgit/stackforge/monasca-agent/commit/?id=91381bfe83b825e03e6dab12cbd407175efa4acc
Submitter: Jenkins
Branch: master

commit 91381bfe83b825e03e6dab12cbd407175efa4acc
Author: Haruki Yamanashi <email address hidden>
Date: Fri Sep 18 15:51:37 2015 +0900

    Unify unit expression for Monasca description

    Some of the unit expression in the semantics for metrics are unified.

    Change-Id: I9a598b24925d540384cfa52d23c8f123e7874007
    Closes-Bug: #1496276