test-appliance: fix specifying f2fs mount options in config file

Status from this message: Applied, thanks.

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#	Subject and files	Size	Replies	Applied
1/2	test-appliance: fix specifying f2fs mount options in config file`kvm-xfstests/test-appliance/files/root/fs/f2fs/config`	+2 -5	2 replies
2/2	test-appliance: add 'encrypt' config for f2fs`kvm-xfstests/test-appliance/files/root/fs/f2fs/cfg/all.list` `kvm-xfstests/test-appliance/files/root/fs/f2fs/cfg/encrypt` `kvm-xfstests/test-appliance/files/root/fs/f2fs/config`	+18 -0	2 replies

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