def generate_volume_names(tenant, datastore_name, len):
    """ Returns a list of volume names
    e.g. volNames = ['tenant1_vol1@sharedVmfs-0', 'tenant1_vol2@sharedVmfs-0', 'tenant1_vol3@sharedVmfs-0']
    """
    volNames = []
    for x in range(len):
        volNames.append(tenant + "_vol" + str(x + 1) + "@" + datastore_name)
    return volNames