Update istio/operator Docker tag to v1.7.4

Dockerfile

@@ -2,7 +2,7 @@ ARG BASE_REGISTRY=registry1.dsop.io
 ARG BASE_IMAGE=ironbank/redhat/ubi/ubi8
 ARG BASE_TAG=8.2
 
-FROM istio/operator:1.7.3 AS base
+FROM istio/operator:1.7.4 AS base
 
 FROM ${BASE_REGISTRY}/${BASE_IMAGE}:${BASE_TAG}
 
@@ -10,7 +10,7 @@ LABEL org.opencontainers.image.title="istio-operator" \
       org.opencontainers.image.description="The istio-operator allows you to package, deploy, and manage Istio in Kubernetes." \
       org.opencontainers.image.licenses="Apache-2.0" \
       org.opencontainers.image.url="https://istio.io" \
-      org.opencontainers.image.version="1.7.3" \
+      org.opencontainers.image.version="1.7.4" \
       maintainer="cht@dsop.io"
 
 COPY --from=base /usr/local/bin/operator /usr/local/bin/operator

Jenkinsfile

 @Library('DCCSCR@master') _
-dccscrPipeline(version: "1.7.3")
+dccscrPipeline(version: "1.7.4")
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download.yaml

 ---
 special-image-path: opensource/istio/operator
 resources:
-  - url: "docker://docker.io/istio/operator@sha256:4db54ece8a4aaf9273bc708c09b962f490a3504ce42c18e34b4c5dbb761cf9ea"
-    tag: "istio/operator:1.7.3"
+  - url: "docker://docker.io/istio/operator@sha256:a63ab81da9ca1e928d11f068e39ecf9ec7d1d3c39f1892feacae006ea8a24f48"
+    tag: "istio/operator:1.7.4"
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