Make the functions parameterized in order to call the main method
from another python class. Before the methods used a global
variable to access the values.

The load of the program arguments are moved to the main function
call and the rest is extracted into a main function, that get
the needed arguments passed.

Use the parameters -res and -reso to reset the kubernetes cluster.
With -reso only the cluster is resetted in nothing else is executed.
With -res the cluster gets resetted before execution of the usecase.