BERLIN (Reuters) - Growth in Germany's services sector stayed weak in November, a survey showed on Wednesday, with persistent labour shortages pushing up wages as companies continued to add staff despite a drop in new orders.IHS Markit's final services Purchasing Managers' Index (PMI) edged up to 51.7 from 51.6 in October, also beating a preliminary reading of 51.3.The final composite PMI, which tracks the manufacturing and services sectors that together account for more than two-thirds of..