Fix filename for downloaded capture
Fix filename for downloaded capture

Changes the name from UUIDpcap to UUID.pcap

closes #812

lebauce/skydive,lebauce/skydive,safchain/skydive,safchain/skydive,skydive-project/skydive,skydive-project/skydive,lebauce/skydive,safchain/skydive,lebauce/skydive,safchain/skydive,skydive-project/skydive,lebauce/skydive,safchain/skydive,safchain/skydive,skydive-project/skydive,lebauce/skydive,safchain/skydive,skydive-project/skydive,skydive-project/skydive,safchain/skydive,skydive-project/skydive,lebauce/skydive,lebauce/skydive