tests: speed up ipsec unit tests execution
tests: speed up ipsec unit tests execution

... by removing duplicit test cacses.
There is little value in testing ESN flag when no integ algo
is used. This patch removes such test cases.

Type: improvement

Change-Id: Iae5baa1d39ac32a65d1d28ad57771a87962d8bb3
Signed-off-by: Filip Tehlar <9891019d6f5d48a43af8fb71dfec78974db6001d@cisco.com>

chrisy/vpp,FDio/vpp,FDio/vpp,chrisy/vpp,FDio/vpp,chrisy/vpp,FDio/vpp,FDio/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp