dials.estimate_resolution: improved error handling

[rjgildea]

• Handle resolution fit failure as highlighted by @jbeilstenedmands
• Handle mismatched number of expt/refl tables

[codecov]

Codecov Report

Merging #1494 (2176876) into master (eb1600a) will increase coverage by 0.03%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #1494      +/-   ##
==========================================
+ Coverage   65.57%   65.61%   +0.03%     
==========================================
  Files         614      614              
  Lines       68956    69031      +75     
  Branches     9519     9534      +15     
==========================================
+ Hits        45219    45294      +75     
  Misses      21898    21898              
  Partials     1839     1839              

[jbeilstenedmands]

$ dials.estimate_resolution scaled.*
The following parameters have been modified:

input {
  experiments = scaled.expt
  reflections = scaled.refl
}

DIALS (2018) Acta Cryst. D74, 85-97. https://doi.org/10.1107/S2059798317017235
DIALS 3.dev.276-g2176876f8
Read 85 predicted reflections
Selected 22 scaled reflections
Resolution fit against cc_half failed: No reflections left for fitting
$

Nice, I like it!