Improve tools/make_test_data.sh correctness

This change allows the script tools/make_test_data.sh and
tools/make_test_data.py to work correctly by handing
exceptions appropriately.


Change-Id: Ib054c3e10d617686928bf03f94c5ff868905afde
Closes-bug: 1389684
Clean up bin directory

Move ceilometer-test-event.py from directory bin to directory tools,
since it's for test purpose.

Change-Id: I3485a27ae66e255fbc460d0548be9dbb5700fa42
Added missing measurements and corrected errors in doc

1. Added the missing hardware snmp metrics.
2. Added a note about some compute metrics which are generated by
rate_of_change transformer on certain hypervisor.

Change-Id: I2156466e8ca5c5ec8bc808e3fbe275b591721f8a
Closes-Bug: #1393328
Merge "Added missing measurements and corrected errors in doc"
Merge "Improve tools/make_test_data.sh correctness"
Merge "Clean up bin directory"