virtual_environment_datastores.go: Update remote command to get datas…

…ource path (#49)

This commit fixes the shell command that is being executed to get the datasource
path which appears to be no longer functional.

The previous command assumed that "path" is going to be the next line after the
datasource name, leaving NFS mounts and other types of mount points non-functional.

proxmox/virtual_environment_datastores.go

@@ -167,7 +167,7 @@ func (c *VirtualEnvironmentClient) UploadFileToDatastore(d *VirtualEnvironmentDa
 		}
 
 		buf, err := sshSession.CombinedOutput(
-			fmt.Sprintf(`grep -Pzo ': %s\s+path\s+[^\s]+' /etc/pve/storage.cfg | grep -Pzo '/[^\s]*' | tr -d '\000'`, d.DatastoreID),
+			fmt.Sprintf(`awk "/.+: %s$/,/^$/" /etc/pve/storage.cfg | grep -oP '(?<=path[ ])[^\s]+' | head -c -1`, d.DatastoreID),
 		)
 
 		if err != nil {