DBZ-4999 Add informix connector

Author: jpechane

connect/2.5/Dockerfile

@@ -16,6 +16,7 @@ ENV DEBEZIUM_VERSION="2.4.0.Final" \
     SPANNER_MD5=186b07595e914e9139941889fd675044 \
     VITESS_MD5=3b4d24c8c9898df060c408a13fd3429f \
     JDBC_MD5=77c5cb9adf932ab17c041544f4ade357 \
+    INFORMIX_MD5=TBD \
     KCRESTEXT_MD5=25c0353f5a7304b3c4780a20f0f5d0af \
     SCRIPTING_MD5=53a3661e7a9877744f4a30d6483d7957
 
@@ -28,6 +29,7 @@ RUN docker-maven-download debezium mongodb "$DEBEZIUM_VERSION" "$MONGODB_MD5" &&
     docker-maven-download debezium-additional jdbc jdbc "$DEBEZIUM_VERSION" "$JDBC_MD5" && \
     docker-maven-download debezium-additional spanner spanner "$DEBEZIUM_VERSION" "$SPANNER_MD5" && \
     docker-maven-download debezium-additional vitess vitess "$DEBEZIUM_VERSION" "$VITESS_MD5" && \
+    docker-maven-download debezium-additional informix informix "$DEBEZIUM_VERSION" "$INFORMIX_MD5" && \
     docker-maven-download debezium-optional connect-rest-extension "$DEBEZIUM_VERSION" "$KCRESTEXT_MD5" && \
     docker-maven-download debezium-optional scripting "$DEBEZIUM_VERSION" "$SCRIPTING_MD5"
 

connect/snapshot/Dockerfile

@@ -10,7 +10,7 @@ ENV DEBEZIUM_VERSION=$DEBEZIUM_VERSION \
 #
 # Download the snapshot version of the connectors and then install them into the `$KAFKA_CONNECT_PLUGINS_DIR/debezium` directory...
 #
-RUN for CONNECTOR in {mysql,mongodb,postgres,sqlserver,oracle,db2,jdbc,spanner,vitess}; do \
+RUN for CONNECTOR in {mysql,mongodb,postgres,sqlserver,oracle,db2,jdbc,spanner,vitess,informix}; do \
     SNAPSHOT_VERSION=$(curl --silent -fSL $MAVEN_OSS_SNAPSHOT/io/debezium/debezium-connector-$CONNECTOR/$DEBEZIUM_VERSION/maven-metadata.xml | awk -F'<[^>]+>' '/<extension>tar.gz<\/extension>/ {getline; print $2; exit}'); \
     echo "Downloading and installing debezium-connector-$CONNECTOR-$SNAPSHOT_VERSION-plugin.tar.gz ..." ; \
     curl --silent -fSL -o /tmp/plugin.tar.gz \