By Andrew MacAskill and Krishna N. Das NEW DELHI (Reuters) -Britain and India agreed on Friday to step up defence and business cooperation during a visit to New Delhi by Boris Johnson, who said a bilateral free-trade deal could be wrapped up by October. On his first visit to the Indian capital as UK prime minister, Johnson discussed with his Indian counterpart Narendra Modi ways to boost security ties with India, which buys more than half of its military hardware from Russia. India’s foreign secretary, however, said Johnson did not put pressure on Modi over New Delhi’s position on Russia’s inv…