fernet-manage:
- filter used to return a list on python2 but on python3 it returns
an iterator which has no len method
- Coherce the keys var into a list so we can run len on it on both
versions
update-endpoint:
- ConfigParser is called configparser on python3
- try/catch and import the proper configparser
Change-Id: I8296074f4d20e47afe0c7aea41bf21999685aecd
e136b0d822