[common/elasticsearch] update elasticsearch image

switch to version 7.6.2 in guilin

Issue-ID: OOM-2579
Signed-off-by: Alexander Dehn <alexander.dehn@highstreet-technologies.com>
Change-Id: I08e226b1898ee299e8cdf1165f2783b857bcfb03
Signed-off-by: Alexander Dehn <alexander.dehn@highstreet-technologies.com>
3 files changed