…b_links csv files

Description of PR

Summary:
Fixes # (issue)

Type of change

• Bug fix
• Testbed and Framework(new/improvement)
• Test case(new/improvement)

Approach

What is the motivation for this PR?

The devices and links between them are added to a csv files lab_devices.csv and lab_links.csv. These files are fed into creategraph.py to generate to lab_connection_graph.xml file.

When dealing with many testbeds, all the devices and links are added to these files without any spaces or comments - making it hard to read.

Need to add capability to add empty lines and comments in these csv files.

Sample lab devices file:

Hostname,ManagementIp,HwSku,Type

# DUTs
str-msn2700-01,10.251.0.188/23,Mellanox-2700,DevSonic

# Fanouts
str-7260-10,10.251.0.13/23,Arista-7260QX-64,FanoutLeaf
str-7260-11,10.251.0.234/23,Arista-7260QX-64,FanoutRoot

# Testbed servers
str-acs-serv-01,10.251.0.245/23,TestServ,Server

How did you do it?

When using csv.DictReader - filter out empty lines and those starting with '#'

How did you verify/test it?

• ran creategraph.py with files with no comment and empty lines and with comments and empty lines.
• compared the generated lab_connection_graph.xml and made sure that that there are no differences.

Any platform specific information?

Supported testbed topology if it's a new test case?

Documentation