Add resize node function for azure driver

[rajat-garg-del]

Add resize node function for azure driver

Description

Background

https://github.com/apache/libcloud/issues/1964

To start with we have def ex_change_node_size(self, node, new_size) function in [https://github.com/apache/libcloud/blob/trunk/libcloud/compute/drivers/ec2.py] which supports instance type change for AWS.

We need similar functionality for Azure cloud as well where we could change the vmSize for Azure cloud. This could be done by adding node_resize function at (https://github.com/apache/libcloud/blob/trunk/libcloud/compute/drivers/azure_arm.py )

Implementation

1. Added ex_resize_node to change the azure vm instance type.
2. Added equivalent test test_resize_node to test ex_resize_node

Status

• done, ready for review

Checklist (tick everything that applies)

• [x] Code linting (required, can be done after the PR checks)
• [ ] Documentation
• [x] Tests
• [ ] ICLA (required for bigger changes)

[rajat-garg-del]

@Kami Can u take a look into this?

[codecov-commenter]

Codecov Report

Merging #1965 (5530f54) into trunk (a9f0dcf) will increase coverage by 0.00%. The diff coverage is 100.00%.

@@           Coverage Diff           @@
##            trunk    #1965   +/-   ##
=======================================
  Coverage   83.19%   83.20%           
=======================================
  Files         353      353           
  Lines       81412    81423   +11     
  Branches     8591     8591           
=======================================
+ Hits        67729    67740   +11     
  Misses      10875    10875           
  Partials     2808     2808           

Files	Coverage Δ
libcloud/compute/drivers/azure_arm.py	60.43% <100.00%> (+0.28%)	:arrow_up:
libcloud/test/compute/test_azure_arm.py	98.98% <100.00%> (+0.01%)	:arrow_up:

[Kami]

Merged into trunk. Thanks for the contribution.