runtest/net.nfs: Run nfs02_06 on TCP only

UDP support disabled was on NFS server in kernel 5.6.
Due that 2 of 3 nfs06.sh tests runs are being skipped on newer kernels.

Therefore NFSv3 job in nfs02_06 test as TCP. This way all jobs in the
test are TCP, thus test will not be skipped. This also bring NFSv3
testing also under TCP (previously it was tested only on UDP).

Keep UDP in nfs01_06 jobs, so that NFSv3 on UDP is still covered for
older kernels.

Acked-by: Cyril Hrubis <chrubis@suse.cz>
Signed-off-by: Petr Vorel <pvorel@suse.cz>

runtest/net.nfs

@@ -58,7 +58,7 @@ nfs41_ipv6_05 nfs05.sh -6 -v 4.1 -t tcp
 nfs42_ipv6_05 nfs05.sh -6 -v 4.2 -t tcp
 
 nfs01_06  nfs06.sh -v "3,3,3,4,4,4" -t "udp,udp,tcp,tcp,tcp,tcp"
-nfs02_06 nfs06.sh -v "3,4,4.1,4.2,4.2,4.2" -t "udp,tcp,tcp,tcp,tcp,tcp"
+nfs02_06 nfs06.sh -v "3,4,4.1,4.2,4.2,4.2" -t "tcp,tcp,tcp,tcp,tcp,tcp"
 nfs03_ipv6_06 nfs06.sh -6 -v "4,4.1,4.1,4.2,4.2,4.2" -t "tcp,tcp,tcp,tcp,tcp,tcp"
 
 nfs3_07 nfs07.sh -v 3 -t udp