Fix security issues in DBAAS docker image

Fix security issues in DBAAS docker image

Anchore scan reported some security issues reported at CVE to exist in DBAAS
base Docker image, Alpine 3.11. To fix the issues update these packages to
DBAAS image on top of the Alpine 3.11:

openssl (fixed in: 1.1.1k-r0)(CVE-2021-3449)
openssl (fixed in: 1.1.1k-r0)(CVE-2021-3450)
libssl1.1 (fixed in: 1.1.1k-r0)(CVE-2021-3449)
libssl1.1 (fixed in: 1.1.1k-r0)(CVE-2021-3450)
libcrypto1.1 (fixed in: 1.1.1k-r0)(CVE-2021-3449)
libcrypto1.1 (fixed in: 1.1.1k-r0)(CVE-2021-3450)
musl-utils (fixed in: 1.1.24-r3)(CVE-2020-28928)
ssl_client (fixed in: 1.31.1-r10)(CVE-2021-28831)
busybox (fixed in: 1.31.1-r10)(CVE-2021-28831)

Remove the install of the curl package what does not seem to be mandatory for
DBAAS operations to exists. This also minimize possible security issues with
curl in the future.

Issue-ID: RIC-794

Signed-off-by: Timo Tietavainen <timo.tietavainen@nokia.com>
Change-Id: I70d847f6438397d1f81bb3d6eb51e0c6f4dc2a57