Update service and disk offerings

[radu-todirica]

Description

Update service and disk offerings
The following createDiskOffering and createServiceOffering API parameters are not exposed in UI:
iops read rate max
iops read rate max length
iops write rate max
iops write rate max length
bytes read rate max
bytes read rate max length
bytes write rate max
bytes write rate max length
Also the updateDiskOffering and updateServiceOffering endpoints doesn't update the bursting options.

The following changes have been added:

1. Expose IO bursting options in UI
2. Add the possibility to set the IO bursting options when creating a service or disk offerings
3. Add the ability to modify the bytes/iops read/write max and max length fields of a service and disk offering.

Types of changes

• Breaking change (fix or feature that would cause existing functionality to change)
• New feature (non-breaking change which adds functionality)
• Bug fix (non-breaking change which fixes an issue)
• Enhancement (improves an existing feature and functionality)
• Cleanup (Code refactoring and cleanup, that may add test cases)

Screenshots (if appropriate):

How Has This Been Tested?

Changed test_02_edit_disk_offering test and added random data for IO bursting options.
test_disk_offerings_runinfo.txt
test_disk_offerings_results.txt

Changed test_02_edit_service_offering test and added random data for IO bursting options.
service_offerings_results.txt
service_offerings_runinfo.txt