Seemed to break on param called default

[david-crespo]

Param introduced here: oxidecomputer/omicron@6455ec3. Build failure was fixed by changing the name of the param to is_default.

~/oxide/omicron $ cargo build -p oxide-client
   Compiling oxide-client v0.1.0 (/Users/david/oxide/omicron/oxide-client)
error[E0061]: this function takes 2 arguments but 0 arguments were supplied
  --> oxide-client/src/lib.rs:18:1
   |
18 | / progenitor::generate_api!(
19 | |     spec = "../openapi/nexus.json",
20 | |     interface = Builder,
21 | |     tags = Separate,
22 | | );
   | |_^ two arguments are missing
   |
note: method defined here
  --> oxide-client/src/lib.rs:18:1
   |
18 | / progenitor::generate_api!(
19 | |     spec = "../openapi/nexus.json",
20 | |     interface = Builder,
21 | |     tags = Separate,
22 | | );
   | |_^
   | |_|
   |
   = note: this error originates in the macro `progenitor::generate_api` (in Nightly builds, run with -Z macro-backtrace for more info)
help: provide the arguments
   |
22 | )(/* types::builder::IpPoolCreate */, /* value */);
   |  +++++++++++++++++++++++++++++++++++++++++++++++++

For more information about this error, try `rustc --explain E0061`.
error: could not compile `oxide-client` (lib) due to previous error