[FIX] tools: `find_in_path` exceptions shadowing

This commit changes the default behavior of `find_in_path`: it doesn't
shallow the IOError exceptions anymore. It especially allows the asset
bundle mechanism to handle the absence of the binaries used to compile
sass/less to css.

* ir_qweb: fallback the value of `get_command` to allow QWeb to display a message like
  "Could not execute command lessc"
* ir_qweb: use of `find_in_path` to fetch binaries, allowing to look for binaries
  in `bin_path` (Windows releases)
* fixed call of `find_in_path` by `_check_external_dependencies` in
  module.py
* fixed call of `find_in_path` by report.py (it was manually raising an
IOError)

0 files changed, 0 insertions, 0 deletions