Add functionality to obtain amplifier linearity parameters

Amplifier linearity parameters are now read in from the
hsc_geom.paf policy file and stored in the curretnly
available AmpInfoTable fields: linearityType and
linearityCoeffs.  These may be changed when the linearity
corrections are defined and implemented in LSST.
Fix ccd name keys in specialChipMap: hscNNN -> NNN

Also changes the variable the key is being compared to to be
detConfig.serial which is what NNN is referring to (rather
than detConfig.name).
Add import shutil so that --clobber command line option works
Remake camera FITS files including amplifier linearity parameters
Update camera.py with proper detectorType for FOCUS ccds
Account for SUPRIME_DATA_DIR env variable inconsistencies on tiger

It seems there are inconsistencies in how SUPRIME_DATA_DIR is
set and interpreted on the Princeton tiger nodes.  If set to
/tigress/HSC/HSC, where the data live, there should be no extra
/HSC appended to the policy directory lookup in HscMapper.

This may be a temporary fix.
Add explicit namespace to variables.
Fix input parameters to maskAndInterpDefect to include defects
Update linearize function to read in Linearity Parameters from AmpInfoTable
Further update linearize function
Use ip_isr's maskAndInterpDefect function

Delete local maskDefect function in favor of using the (essentially
identical) maskAndInterpDefect function in ip_isr's isrTask.py.
Use doDefect config clause when calling maskAndInterpDefect.
Set doDefect config default to True.
Wrap defect masking in a try/except statement

Likely a temporary fix: currently daf_butlerUtils raises a
RuntimeError if the given ccd has no defects so is not listed
in the registry.
Add missing date fields to bias and dark profiles in HscMapper.paf
Make defaults True for doBias and doDark
Fix "no defects found" warning message