`PATH` not being updated when installing `cbmc-viewer` v2.11 on Ubuntu 20.04 via pip

[angelonakos]

Description

While installing CBMC viewer v2.11 on an AWS EC2 machine running an Ubuntu 20.04 AMI via pip will work fine, the cbmc-viewer command cannot be found, because the '/home/ubuntu/.local/bin' is not in PATH.

$ pip3 install cbmc-viewer==2.11
Collecting cbmc-viewer==2.11
  Downloading cbmc_viewer-2.11-py3-none-any.whl (80 kB)
     |████████████████████████████████| 80 kB 11.5 MB/s
Requirement already satisfied: jinja2 in /usr/lib/python3/dist-packages (from cbmc-viewer==2.11) (2.10.1)
Collecting voluptuous
  Downloading voluptuous-0.12.2.tar.gz (48 kB)
     |████████████████████████████████| 48 kB 7.5 MB/s
Requirement already satisfied: setuptools in /usr/lib/python3/dist-packages (from cbmc-viewer==2.11) (45.2.0)
Building wheels for collected packages: voluptuous
  Building wheel for voluptuous (setup.py) ... done
  Created wheel for voluptuous: filename=voluptuous-0.12.2-py3-none-any.whl size=29552 sha256=f531b067cf069c9e544e3a71b6eaf61a8988c02d57afa24ffeb4a1616d6781f6
  Stored in directory: /home/ubuntu/.cache/pip/wheels/63/c0/d7/d09babb5ec150707e09d6cabd2850c2ab322b3fb37b3081511
Successfully built voluptuous
Installing collected packages: voluptuous, cbmc-viewer
  WARNING: The scripts cbmc-viewer, make-coverage, make-loop, make-property, make-reachable, make-result, make-source, make-symbol and make-trace are installed in '/home/ubuntu/.local/bin' which is not on PATH.
  Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.
Successfully installed cbmc-viewer-2.11 voluptuous-0.12.2
$ cbmc-viewer
cbmc-viewer: command not found

Acceptance Criteria

cbmc-viewer command can be found upon installing v2.11 via pip.

[angelonakos]

Connected offline with @ronakfof. We will not be handling this case.