Updated Load_Platform_Extension to support multiple instances

[aliciasteen]

Updated the load_platform_extension to support creation of multiple instances to work as it does with one instance

[nickdgriffin]

Hello!

Thanks for the PR for this, I have a couple of cosmetic tweaks please:

• Can this line be made multi-line again please to help readability? https://github.com/Accenture/adop-platform-management/pull/19/files#diff-7d1b7100a2293be53c756a17c3ff1d29R75
• Can the echo statements within the loop be pre-pended with the instance ID please so it's clear which one it's talking about?

I think we need to have a think about the Nginx handling at the end as if there are multiple hosts we don't know which one should be proxied, so I think it'd make sense for the template to contain an output that states the IP that should be used - the job can then lift that to do the replace in "ec2-extension.conf". @dsingh07 - what do you think?

Thanks,
Nick

[dsingh07]

Hi @aliciasteen @nickdgriffin

Currently the Nginx handling will work in a way such that if the file exists, it will look for a variable called INSTANCE_ID, which in the case of two instances will be in a list.

So yes, I agree that the template should contain an output of the IP that needs to be proxied. This may mean we need to rewrite some of our existing platform extensions (i.e sample and Chef) to give this output.

Thanks,
Dharmanshu

[aliciasteen]

Have updated the split lines and echo instanceIDs

[aliciasteen]

Updated changes ready to merge