convert to RSA private key format
convert to RSA private key format

Signed-off-by: Eystein Måløy Stenberg <1e966b9e014c66ce5aceed412e6a616ca9c6175b@mender.io>

GregorioDiStefano/integration,pasinskim/integration,pasinskim/integration,GregorioDiStefano/integration,pasinskim/integration