Add stx-snmp docker image

This change reorganizes the source directories of the stx-snmp
container to be reused by both CentOS and Debian Dockerfiles in order
to build the images having the corresponding OS-specic base.

Test plan:

PASS: Debian - Build Debian docker image and upload/apply snmp app
changing the stx-snmp references to point to the new image.
Verified that the app is applied, and the container is created.
PASS: Verified common snmp scenarios:
 - test snmpwalk for 2c and 3 snmp version
 - test snmpget for 2c and 3 snmp version
 - verified traps are working as expected.

PASS: CentOS - Same tests have been done building a CentOS container.

Story: 2009831
Task: 45732

Signed-off-by: Enzo Candotti <enzo.candotti@windriver.com>
Change-Id: I7ecd52c1ad60ab1e82cb50805b71e772e3b93ec4

stx-snmp-helm/docker/stx-snmp/Dockerfile.debian

@@ -0,0 +1,22 @@
+FROM debian AS builder
+ENV DEBIAN_FRONTEND=noninteractive
+RUN apt-get -y update
+RUN apt-get -y install\
+           snmp snmpd snmptrapd \
+           libsnmp-dev \
+           gcc \
+           make \
+           uuid-dev
+RUN ln -s /usr/lib/libuuid.so.1.3.0 /usr/lib/libuuid.so
+WORKDIR /home
+COPY ./src/* /home/src/
+WORKDIR /home/src/
+RUN make -f Makefile
+
+FROM builder AS deployment-env
+COPY ./mibs/*  /usr/share/snmp/mibs/
+COPY --from=builder /home/src/libsnmpAuditPlugin.so /usr/lib/
+EXPOSE 161/udp
+EXPOSE 162/udp
+EXPOSE 705/tcp
+CMD /usr/sbin/snmpd $OPTIONDEBUG -f