Support "bigflash" nodes selection on Gordon.
Support "bigflash" nodes selection on Gordon.

Implemented through "nodes resource_list" expansion.
Fixes #406.

mehdisadeghi/saga-python,luis-rr/saga-python,telamonian/saga-python,mehdisadeghi/saga-python,luis-rr/saga-python,luis-rr/saga-python,telamonian/saga-python