Russia and Saudi Arabia’s cooperation is set to continue, Ibrahim al-Muhanna, Saudi energy advisor, said on Friday, in hopes of allaying the lingering fears that Russia is itching to get out from under the deal that has restricted its crude oil production. Russia’s finance minister last weekend hinted that Russia may fight America for its share of the oil market by bailing on the OPEC deal—even doing so lowers the price of oil. The statement sparked fear in the oil market that the agreement forged with OPEC was drawing to a premature…