Distributed scan init

[souvik-karfa]

Summary:

Replaced the following steps using a FileCallable:

• Downloading the binary
• Copying the script

Replaced the following steps with Launcher:

• Running the script
• Deleting the temporary script using rm command.

These ensure that all the processes take place at the remote agent, where the workspace is present.

Points to note:

• We have the option of providing the path to the binary. The user will need to make sure that the binary is available at the remote agent.