Revert "[libsignon-qt] Use INT_MAX timeout for signon dbus"

This should have been applied directly to the subtree, not as a RPM
patch.

This reverts commit 1eb709b3cc6ea0636db4b9a1dabf5cd93c0ddf8b.
Partial backport of lib: set timeout for D-Bus calls to INT_MAX

QDBusAbstractInterface uses the default D-Bus timeout (about 30 seconds)
unless instructed otherwise. But when UI-interactions are involved, the
authentication process can last longer than that.
This commit sets the timeout to INT_MAX.

Fixes: https://bugs.launchpad.net/bugs/1220823
Merge pull request #4 from special/fix-timeout-patch

[libsignon-qt] Apply dbus timeout patch properly