SAM export system groups to host collections

+ corrected CLI params to properly read server, username, and password
+ awful work-around for organizations API requiring nested _and_ unnested param
+ minor code style update (to remove .call on separate line)
Merge pull request #65 from thomasmckay/sam-sys-groups

SAM export system groups to host collections
rubocop - Lint/AmbiguousRegexpLiteral
Merge pull request #66 from komidore64/ambiguous-regex-literal

rubocop - Lint/AmbiguousRegexpLiteral