Unskip load balancer basic scenario test

Corresponding bug 1294603 was fixed by commit
I0dc4d01b0c1c04887ec6ad5766ec7c6c96903faa

Due to recent changes in neutron and nova which
fixed security groups for ml2 plugin
If004db60e084f4cea095ca9ecccb0537240d4183 and I3bbcfc67036ab7389c82720add0bc0fc627bfee0,
one should create security group rules to allow traffic on specific tcp port.
So patch adds rules to allow ingress traffic
for ports 80 and 88.

Closes-Bug: #1294603
Change-Id: Idff6d27611adda502e6e3f7e0d37f3acbda41d03
Merge "Unskip load balancer basic scenario test"