vrouter agent core @ VrfEntry::DeleteTimeout

[Sudheendra Rao]

vrouter agent core at VrfEntry::DeleteTimeout is seen on R2.22.x build12 sanity on ubuntu.
The backtrace is:

[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `/usr/bin/contrail-vrouter-agent'.
Program terminated with signal SIGABRT, Aborted.
#0 0x00007f735c95acc9 in __GI_raise (sig=sig@entry=6)
    at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
#0 0x00007f735c95acc9 in __GI_raise (sig=sig@entry=6)
    at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
#1 0x00007f735c95e0d8 in __GI_abort () at abort.c:89
#2 0x00007f735c953b86 in __assert_fail_base (
    fmt=0x7f735caa4830 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n",
    assertion=assertion@entry=0x1093ad5 "0",
    file=file@entry=0x10a2c80 "controller/src/vnsw/agent/oper/vrf.cc",
    line=line@entry=333,
    function=function@entry=0x10a2e40 "bool VrfEntry::DeleteTimeout()")
    at assert.c:92
#3 0x00007f735c953c32 in __GI___assert_fail (assertion=0x1093ad5 "0",
    file=0x10a2c80 "controller/src/vnsw/agent/oper/vrf.cc", line=333,
    function=0x10a2e40 "bool VrfEntry::DeleteTimeout()") at assert.c:101
#4 0x0000000000a0bbed in VrfEntry::DeleteTimeout() ()
#5 0x000000000105a8b9 in Timer::TimerTask::Run() ()
#6 0x000000000105431c in TaskImpl::execute() ()
#7 0x00007f735d529b3a in ?? () from /usr/lib/libtbb.so.2
#8 0x00007f735d525816 in ?? () from /usr/lib/libtbb.so.2
#9 0x00007f735d524f4b in ?? () from /usr/lib/libtbb.so.2
#10 0x00007f735d5210ff in ?? () from /usr/lib/libtbb.so.2
#11 0x00007f735d5212f9 in ?? () from /usr/lib/libtbb.so.2
#12 0x00007f735d745182 in start_thread (arg=0x7f73553de700)
    at pthread_create.c:312
#13 0x00007f735ca1e47d in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

The core file is at:
/cs-shared/test_runs/nodei13-vm1/2016_05_11_21_28_24/

[Hari Prasad Killi (haripk)]

https://review.opencontrail.org/#/c/20151/
https://review.opencontrail.org/#/c/20153/
https://review.opencontrail.org/#/c/20154/

Not relevant to mainline and R3.0.

[Jeba Paulaiyan (jebap)]

https://review.opencontrail.org/#/c/20154/ meant for R2.22.x got merged.