Testing framework: support for extra arguments in node startup

[paolocappelletti]

In the testing framework the extra_args parameter is declared but not handled in the method start_sc_node() here:

Sidechains-SDK/qa/SidechainTestFramework/scutil.py

Line 340 in b6b533e

def start_sc_node(i, dirname, extra_args=None, rpchost=None, timewait=None, binary=None, print_output_to_file=False):

could be useful if we have to pass custom system properties to the node with -D option
Note: as temporary solution I tried to include the -D option in the "binary" argument: this works but does not support values with spaces , as they cause a wrong split of the command line here:

Sidechains-SDK/qa/SidechainTestFramework/scutil.py

Line 358 in b6b533e

sidechainclient_processes[i] = subprocess.Popen(bashcmd.split())

[i-Alex]

@paolocappelletti is it still a case?