Hanover-based cybersecurity and intelligence contractor KEYW Holding Corp. is selling one of its business lines for $12 million and looking at unloading another, it said Wednesday as it released fourth-quarter earnings capping a tumultuous year. KEYW (NASDAQ: KEYW) is selling its systems engineering and technical assistance business to Lexington, Mass.-based professional consulting service company Quantech Services Inc. The sale is expected to close quickly, within two weeks. It will leave a simplified...