Add more Multiclamp Commander Settings to .extract_sweep_stim_info() in AibsDataSet

[kasbaker]

We need all the settings listed in .register_enabled_names(), which is a method of LabNotebookReader. Additionally, there should be settings for Cp Fast and Cp Slow, which each have a capacitance and time constant associated with them. I could not find these settings in .register_enabled_names(). This issue is related to AllenInstitute/sweep_qc_tool#51

[tmchartrand]

Just wanted to echo that this is an important feature and it would be great to get @kasbaker 's fixes merged soon.
While the get_notebook_value solution gets part of the way there, I would suggest that at least those values relevant to current clamp sweeps (namely capacitance neutralization) be added to get_sweep_metadata by default as in the original PR. This would allow the features to be accessible from the sweep table and in the output json, to simplify querying across cells/sweeps without actually loading the NWB. I can file a separate PR for this, since I've already been running it on my fork.
Potentially, the longer list of voltage-clamp metadata could be added also, conditional on a check of the sweep's clamp type, which would minimize any performance hit from repeatedly checking for properties that are not present.