[INTERNAL] sap.m.MultiInput: Closing the popover in QUnit fixed
[INTERNAL] sap.m.MultiInput: Closing the popover in QUnit fixed

When the MultiInput is in readonly mode and has one long truncatedtoken when the popover is opened it takes more time in Firefox to move the focus on it.
The timing is increased in the QUnit test that fails in Firefox because of that.

BCP: 2070204664
Change-Id: Id0c40b6d4a41f30ed0f940d0cd0055e63ea01193

SAP/openui5,SAP/openui5,SAP/openui5,SAP/openui5