Modified developer.sh file

[devarsh10]

In this PR,

What was expected?

• It was expected that, all the components deploys one after another.
• Hosts file should get populated even after the restart.

What was happening?

• All the components were running simultaneously, causing, over load on CPU.
• After restart the hosts file was not used to be populated with gazelle hosts, causing make-payment script to fail.

What I have done?

• I have added stability check and kubectl wait commnad in all the functions, which makes sure once all the services are stable of that component, before moving forward to deploy another.
• So, I have added updated the script(maybe commandline.sh) which populates the hosts file with gazelle hosts.

The deployment order is: Infra -> vNext -> phee -> mifos gazelle