Miscellaneous fixes for various automation UI failures.

a) Base UI: Add optimum delay for `wait_until_element` function
b) login UI: I think earlier we had no `Default location`, but now since Beta we do have, hence removed location creation and added location selection similar to Orgs.
c) navigation UI: Many failures due to the use of `find_element`, looks to be just timing issues.
d) Fix tests UI: puppet-environment accepts only alphanumeric values, which is stated explicitly by the UI.
e) Raised the genuine bugs and added them to be skipped for testcases.
Yeah, specific exception is better :)