resolve ClobberError reports during environment creation

[prjemian]

When creating a new conda bluesky_2020_9 environment, several ClobberError reports appear (see #63). So far:

ClobberError: This transaction has incompatible packages due to a shared path.
  packages: defaults/linux-64::python-3.8.2-hcf32534_0, defaults/linux-64::lazy-object-proxy-1.4.3-py38h7b6447c_0, defaults/linux-64::markupsafe-1.1.1-py38h7b6447c_0, defaults/linux-64::simplejson-3.17.0-py38h7b6447c_0, defaults/linux-64::wrapt-1.11.2-py38h7b6447c_0, defaults/linux-64::gobject-introspection-1.56.1-py38h9a62fa1_2, defaults/linux-64::pyqt-5.9.2-py38h05f1152_4
  path: 'lib/python3.8/__pycache__/_sysconfigdata_x86_64_conda_cos6_linux_gnu.cpython-38.pyc'


ClobberError: This transaction has incompatible packages due to a shared path.
  packages: nsls2forge/noarch::hklpy-0.3.14-py_0, conda-forge/noarch::typhos-1.0.2-py_0
  path: 'lib/python3.8/site-packages/tests/__init__.py'


ClobberError: This transaction has incompatible packages due to a shared path.
  packages: nsls2forge/noarch::hklpy-0.3.14-py_0, conda-forge/noarch::typhos-1.0.2-py_0
  path: 'lib/python3.8/site-packages/tests/__pycache__/__init__.cpython-38.pyc'

[prjemian]

See:

• ClobberError conflict with hklpy pcdshub/typhos#397
• ClobberError conflict with typhos bluesky/hklpy#22

[prjemian]

These are not problems that can be resolved by this repository.