Cleanup previous chart

[devdattakulkarni]

Currently in helmer and kubeconfiggenerator, a Service's chart is untarred with a command like so:
Inside untarChart.untar cmd:tar -xvzf wordpress-chart-0.0.1.tgz

This creates the chart in a folder named "wordpress-chart".
The problem is, that if there is already a folder with that name, then the above operation will not overwrite that folder.
Instead, the contents of the earlier folder will remain in-tact and the newly untarred folder contents will be added to it.
This is problematic.

A better approach will be to untar each service's chart in a folder with that service name.
The change would look like this:
mkdir <service-name> && tar -xvzf wordpress-chart-0.0.1.tgz -C <service-name>

The subsequent steps in which we are using the chart-name in helm install will need to change to instead use the service-name used above in the helm install command.

[devdattakulkarni]

Another option is to keep the current implementation as it is and include "rm -rf " as a step before executing the tar command. This will ensure that when the tar command is executed a new folder with the chart name will get created.