Provides the ability to run in environment execution where multiproce…

[michelorengo]

Importing the tdqm module (_tqdm.py creates 2 global locks) in environments where multiprocessing locks are not implemented raises an OSError. For instance, running papermill in an AWS Lambda will fail because the AWS Lamdba execution environment does not have /dev/shm (shared memory for processes) support.
This suggested PR checks whether tdqm can be imported or not and prevent the use of the progress bar if the module can't be imported.

[codecov]

Codecov Report

Merging #111 into master will decrease coverage by 0.05%.
The diff coverage is 66.66%.

@@            Coverage Diff             @@
##           master     #111      +/-   ##
==========================================
- Coverage   63.24%   63.19%   -0.06%     
==========================================
  Files           8        8              
  Lines         917      921       +4     
==========================================
+ Hits          580      582       +2     
- Misses        337      339       +2