modules: Do not hide errors using IPA *_show command with Exception

When searching for objects with *_show IPA API command, most plugins
were hiding errors other than "ipalib_errors.NotFound" by handling the
broad exception Exception instead.

This patch uses "ipalib_errors.NotFound" whenever "*_show" is used so
that the only exception handled is when an object is not found. Other
errors will not be handled making the module break as expected.

plugins/modules/ipaidview.py

@@ -138,7 +138,7 @@ def find_idview(module, name):
     """Find if a idview with the given name already exist."""
     try:
         _result = module.ipa_command("idview_show", name, {"all": True})
-    except Exception:  # pylint: disable=broad-except
+    except ipalib_errors.NotFound:
         # An exception is raised if idview name is not found.
         return None
     return _result["result"]