HTTP GET request to get load_cartridge job to load defaults params.

[RobertNorthard]

The SCM provider parameter is an empty string when the Load_Cartridge job is invoked from a Load_Cartridge_Collection when using the ADOP CLI prior to load cartridge being built through the UI.

This is beacuse;

• the SCM provider default choice list has not been populated
• build parameters that are generated by Scriptler/Groovy scripts are only populated when the Load_Cartridge job "buildWithParameters" has been clicked.

To resolve this prior to running Load_Cartridge a HTTP GET request can be executed to ensure the default parameters are loaded.

To confirm this change behaves as expected check out this PR and run the following CLI commands against a target ADOP. Compare the results with the CLI prior to this PR.

./adop workspace -w DOA create; sleep 10
./adop project -p Labs -w DOA create; sleep 10
./adop project -p Labs -w DOA load_collection -c https://raw.githubusercontent.com/Accenture/adop-doa-materials/master/Cartridge_Collections/doa_cartridge_collection.json

[dsingh07]

Looks good to me, thanks @RobertNorthard

I've tested the above 3 CLI commands and it works fine under all default scenarios.

The cartridge collection is succesfully populates in the project.