introduce changes in scripts

changed cfme_data; introduce param overwrite

browse web dir added

docstrings added

tweak params for scripts

some more docstrings

remove unused lines

auto discover edomain, sdomain, cluster

checking params for vsphere

fixes

change docstrings

finally

new requirement: psphere

inc wait time rhevm; continue on all errors
Merge pull request #599 from apagac/template_edit

template_upload script changes
Merge pull request #569 from seandst/db-module-is-less-terrible

db module is less terrible
Change of nav.go_to to sel.force_navigate
Merge pull request #647 from mfalesni/force_navigate

Change of nav.go_to to sel.force_navigate
setup event testing can take none
Merge pull request #649 from mfalesni/db_none_fix

setup event testing can take none
db tweaks

- sessions autocommit
- ping_connection guards against connection timeouts
- adjusted session usage to use db.transaction when writing