madvise06 from ubuntu_ltp_syscalls warning (Failed to open FILE) with X/X-fips

Issue found on 4.4.0-1050.56 - fips

 startup='Tue Nov 24 10:49:03 2020'
 tst_test.c:1250: TINFO: Timeout per run is 0h 05m 00s
 madvise06.c:104: TINFO: dropping caches
 madvise06.c:78: TWARN: Failed to open FILE '/proc/sys/vm/stat_refresh'
 madvise06.c:79: TINFO: Initial meminfo, later values are relative to this (except memcg)
 madvise06.c:81: TINFO: Swap: 2380 Kb
 madvise06.c:83: TINFO: SwapCached: 2224 Kb
 madvise06.c:85: TINFO: Cached: 48188 Kb
 madvise06.c:87: TINFO: cgmem.usage_in_bytes: 128 Kb
 madvise06.c:147: TINFO: mapping 409600 Kb (102400 pages), limit 204800 Kb, pass threshold 102400 Kb
 madvise06.c:78: TWARN: Failed to open FILE '/proc/sys/vm/stat_refresh'
 madvise06.c:79: TINFO: Before mmap
 madvise06.c:81: TINFO: Swap: 0 Kb
 madvise06.c:83: TINFO: SwapCached: 0 Kb
 madvise06.c:85: TINFO: Cached: 0 Kb
 madvise06.c:87: TINFO: cgmem.usage_in_bytes: 128 Kb
 madvise06.c:186: TINFO: PageFault(before mmap): 0
 madvise06.c:78: TWARN: Failed to open FILE '/proc/sys/vm/stat_refresh'
 madvise06.c:79: TINFO: Before dirty
 madvise06.c:81: TINFO: Swap: 0 Kb
 madvise06.c:83: TINFO: SwapCached: 0 Kb
 madvise06.c:85: TINFO: Cached: 0 Kb
 madvise06.c:87: TINFO: cgmem.usage_in_bytes: 128 Kb
 madvise06.c:191: TINFO: PageFault(before dirty): 0
 madvise06.c:193: TINFO: PageFault(after dirty): 0
 madvise06.c:78: TWARN: Failed to open FILE '/proc/sys/vm/stat_refresh'
 madvise06.c:79: TINFO: Before madvise
 madvise06.c:81: TINFO: Swap: 211272 Kb
 madvise06.c:83: TINFO: SwapCached: 6496 Kb
 madvise06.c:85: TINFO: Cached: 198612 Kb
 madvise06.c:87: TINFO: cgmem.usage_in_bytes: 204796 Kb
 madvise06.c:206: TWARN: Failed to open FILE '/proc/sys/vm/stat_refresh'
 madvise06.c:78: TWARN: Failed to open FILE '/proc/sys/vm/stat_refresh'
 madvise06.c:79: TINFO: After madvise
 madvise06.c:81: TINFO: Swap: 211272 Kb
 madvise06.c:83: TINFO: SwapCached: 194692 Kb
 madvise06.c:85: TINFO: Cached: 198724 Kb
 madvise06.c:87: TINFO: cgmem.usage_in_bytes: 204796 Kb
 madvise06.c:215: TPASS: more than 102400 Kb were moved to the swap cache
 madvise06.c:224: TINFO: PageFault(madvice / no mem access): 2
 madvise06.c:228: TINFO: PageFault(madvice / mem access): 2
 madvise06.c:78: TWARN: Failed to open FILE '/proc/sys/vm/stat_refresh'
 madvise06.c:79: TINFO: After page access
 madvise06.c:81: TINFO: Swap: 219236 Kb
 madvise06.c:83: TINFO: SwapCached: 100236 Kb
 madvise06.c:85: TINFO: Cached: 191044 Kb
 madvise06.c:87: TINFO: cgmem.usage_in_bytes: 204800 Kb
 madvise06.c:233: TPASS: 0 pages were faulted out of 2 max

 Summary:
 passed 2
 failed 0
 skipped 0
 warnings 7
 tag=madvise06 stime=1606214943 dur=1 exit=exited stat=4 core=no cu=4 cs=33

Since these are just warnings, it should not be considered as a blocker.