UNSECURED CREDIT AGREEMENT dated as of November 22, 2013 between XL GROUP PLC, XLIT LTD., X.L. AMERICA, INC., XL INSURANCE (BERMUDA) LTD, XL RE LTD, XL RE EUROPE PLC, XL INSURANCE COMPANY PLC, XL INSURANCE SWITZERLAND LTD AND XL LIFE LTD, as Account...