By Michel Rose and Leigh Thomas PARIS (Reuters) – Companies from non-EU countries could face curbs as soon as this summer when they bid for public contracts in the European Union unless their home country opens its markets, France’s trade minister said on Wednesday. The curbs are an example of a new more assertive approach to EU trade relations, which Trade Minister Franck Riester said had been largely inspired by France. Many EU companies have long found themselves shut out of bidding for public procurement contracts outside Europe even though their home markets in Europe are largely open to …