Increase timeout for waiting for sync repl to settle.
Increase timeout for waiting for sync repl to settle.

This is mainly for the case of the parallel unittests, where the heavy
load leads to delays.

joerg84/arangodb,fceller/arangodb,joerg84/arangodb,joerg84/arangodb,Simran-B/arangodb,fceller/arangodb,wiltonlazary/arangodb,graetzer/arangodb,joerg84/arangodb,Simran-B/arangodb,fceller/arangodb,joerg84/arangodb,arangodb/arangodb,wiltonlazary/arangodb,fceller/arangodb,graetzer/arangodb,joerg84/arangodb,joerg84/arangodb,joerg84/arangodb,wiltonlazary/arangodb,Simran-B/arangodb,fceller/arangodb,graetzer/arangodb,graetzer/arangodb,hkernbach/arangodb,arangodb/arangodb,fceller/arangodb,arangodb/arangodb,arangodb/arangodb,graetzer/arangodb,hkernbach/arangodb,fceller/arangodb,wiltonlazary/arangodb,wiltonlazary/arangodb,Simran-B/arangodb,Simran-B/arangodb,hkernbach/arangodb,joerg84/arangodb,arangodb/arangodb,wiltonlazary/arangodb,hkernbach/arangodb,hkernbach/arangodb,fceller/arangodb,hkernbach/arangodb,hkernbach/arangodb,arangodb/arangodb,graetzer/arangodb,hkernbach/arangodb,graetzer/arangodb,arangodb/arangodb,Simran-B/arangodb,joerg84/arangodb,hkernbach/arangodb,Simran-B/arangodb,graetzer/arangodb,joerg84/arangodb,hkernbach/arangodb,fceller/arangodb,wiltonlazary/arangodb,graetzer/arangodb,graetzer/arangodb,Simran-B/arangodb,joerg84/arangodb,wiltonlazary/arangodb,Simran-B/arangodb,joerg84/arangodb,graetzer/arangodb,graetzer/arangodb,Simran-B/arangodb,arangodb/arangodb,hkernbach/arangodb,hkernbach/arangodb,fceller/arangodb,joerg84/arangodb,hkernbach/arangodb,graetzer/arangodb,graetzer/arangodb,hkernbach/arangodb