Henkel Corp. originally planned to take 135,000 square feet at the BLT Financial Centre, at 200 Elm St., for its laundry, beauty and home care headquarters. Now, it will enlarge its footprint to 155,000 square feet to accommodate a laboratory for the development and testing of its beauty care products, Hearst Connecticut Media has learned. Those products include Dial soap, Right Guard antiperspirant and deodorant, Schwarzkopf hair care and got2b styling products....