shmget(size=1044381696 flags=0xfb0) for uct_test failed: Operation not permitted

[shamisp]

On Softiron:

[     INFO ] memory_type:host 0 1043111936 [1541452321.670801] [softiron-pasha:1314 :0]            sys.c:619  UCX  ERROR shmget(size=1044381696 flags=0xfb0) for uct_test failed: Operation not permitted, please check shared memory limits by 'ipcs -l'
[1541452324.630335] [softiron-pasha:1314 :0]            sys.c:619  UCX  ERROR shmget(size=1044381696 flags=0xfb0) for uct_test failed: Operation not permitted, please check shared memory limits by 'ipcs -l'
1x{0..1043111936} nocomp 32297 
../../../test/gtest/common/test.cc:248: Failure

ipcs -l

------ Messages Limits --------
max queues system wide = 32000
max size of message (bytes) = 8192
default max size of queue (bytes) = 16384

------ Shared Memory Limits --------
max number of segments = 4096
max seg size (kbytes) = 18014398509465599
max total shared memory (kbytes) = 18014398509481980
min seg size (bytes) = 1

------ Semaphore Limits --------
max number of arrays = 32000
max semaphores per array = 32000
max semaphores system wide = 1024000000
max ops per semop call = 500
semaphore max value = 32767

[shamisp]

@yosefe this error started to show up on master.