Two U.S. investment funds have formed a joint venture to invest in Venezuela's oil industry. The funds, Gramercy Funds Management and Amos Global Energy, will partner with a division of Inelectra Group, a Venezuela-based company, which has a stake in an oil project off the eastern coast of Venezuela, where oil was discovered in 2001, Reuters reported. The move may be a signal that the initial signs of thawing in Washington's relations with Caracas are now multiplying. Despite the fact that U.S. companies are only barred from doing business with…