Update tests/samples to use PARENT_IMAGE build arg

Author: kabicin

Diff for: build/build.sh

@@ -52,7 +52,7 @@ then
 fi
 if [ ! -z "$from" ]
 then 
-  buildCommand="$buildCommand --build-arg IMAGE=$from"
+  buildCommand="$buildCommand --build-arg PARENT_IMAGE=$from"
 fi
 
 buildCommand="$buildCommand ."

Diff for: build/test-pet-clinic/Dockerfile

@@ -1,5 +1,5 @@
-ARG IMAGE=openliberty/open-liberty:kernel-slim-java8-openj9-ubi
-FROM ${IMAGE} as staging
+ARG PARENT_IMAGE=openliberty/open-liberty:kernel-slim-java8-openj9-ubi
+FROM $PARENT_IMAGE as staging
 
 # Copy server config so springBootUtility can be downloaded by featureUtility in the next step
 COPY --chown=1001:0 server.xml /config/server.xml
@@ -14,7 +14,7 @@ RUN springBootUtility thin \
  --targetThinAppPath=/staging/myThinApp.jar \
  --targetLibCachePath=/staging/lib.index.cache
 
-FROM ${IMAGE}
+FROM $PARENT_IMAGE
 COPY --chown=1001:0 server.xml /config/server.xml
 
 ARG VERBOSE=false

Diff for: build/test-stock-quote/Dockerfile

@@ -1,5 +1,5 @@
-ARG IMAGE=openliberty/open-liberty:kernel-slim-ubi
-FROM ${IMAGE}
+ARG PARENT_IMAGE=openliberty/open-liberty:kernel-slim-ubi
+FROM $PARENT_IMAGE
 
 ARG VERBOSE=false
 

Diff for: build/test-stock-trader/Dockerfile

@@ -1,5 +1,5 @@
-ARG IMAGE=openliberty/open-liberty:kernel-slim-ubi
-FROM ${IMAGE}
+ARG PARENT_IMAGE=openliberty/open-liberty:kernel-slim-ubi
+FROM $PARENT_IMAGE
 
 ARG VERBOSE=false
 

Diff for: samples/security/Dockerfile

@@ -1,4 +1,5 @@
-FROM openliberty/open-liberty:kernel-slim-ubi
+ARG PARENT_IMAGE=openliberty/open-liberty:kernel-slim-ubi
+FROM $PARENT_IMAGE
 
 # Add my app and config
 COPY --chown=1001:0  server.xml /config/

Diff for: samples/spring-petclinic/Dockerfile

@@ -1,5 +1,5 @@
-ARG IMAGE=openliberty/open-liberty:kernel-slim-java8-openj9-ubi
-FROM ${IMAGE} as staging
+ARG PARENT_IMAGE=openliberty/open-liberty:kernel-slim-java8-openj9-ubi
+FROM $PARENT_IMAGE as staging
 
 # Copy server config so springBootUtility can be downloaded by featureUtility in the next step
 COPY --chown=1001:0 server.xml /config/server.xml
@@ -14,7 +14,7 @@ RUN springBootUtility thin \
  --targetThinAppPath=/staging/myThinApp.jar \
  --targetLibCachePath=/staging/lib.index.cache
 
-FROM ${IMAGE}
+FROM $PARENT_IMAGE
 COPY --chown=1001:0 server.xml /config
 
 # This script will add the requested XML snippets to enable Liberty features and grow image to be fit-for-purpose using featureUtility