Deprecation warninig - collections import for python 3.3+

On python 3.8 there s deprecation warning

```
/usr/local/lib/python3.8/dist-packages/pyeapi/utils.py:173
  /usr/local/lib/python3.8/dist-packages/pyeapi/utils.py:173: DeprecationWarning: Using or importing the ABCs from 'collections' instead of from 'collections.abc' is deprecated since Python 3.3, and in 3.9 it will stop working
    if not isinstance(value, collections.Iterable):

```