Standardize all tests using "buildpack-deps:curl" on an explicit "buildpack-deps:jessie-curl" so we don't get unexpected surprises when Debian Stable changes

test/tests/jetty-hello-web/run.sh

@@ -9,7 +9,7 @@ dir="$(dirname "$(readlink -f "$BASH_SOURCE")")"
 image="$1"
 
 # Use a client image with curl for testing
-clientImage="buildpack-deps:curl"
+clientImage='buildpack-deps:jessie-curl'
 
 # Create an instance of the container-under-test
 serverImage="$("$dir/../image-name.sh" librarytest/jetty-hello-web "$image")"

test/tests/rapidoid-hello-world/run.sh

@@ -9,7 +9,7 @@ dir="$(dirname "$(readlink -f "$BASH_SOURCE")")"
 image="$1"
 
 # Use a client image with curl for testing
-clientImage="buildpack-deps:curl"
+clientImage='buildpack-deps:jessie-curl'
 
 # Create an instance of the container-under-test
 serverImage="$("$dir/../image-name.sh" librarytest/rapidoid-hello-web "$image")"

test/tests/rapidoid-load-balancer/run.sh

@@ -9,7 +9,7 @@ dir="$(dirname "$(readlink -f "$BASH_SOURCE")")"
 image="$1"
 
 # Use a client image with curl for testing
-clientImage="buildpack-deps:curl"
+clientImage='buildpack-deps:jessie-curl'
 
 app1id="$(docker run -d "$image" on.port=80 id=app1 app.services=ping,status)"
 app2id="$(docker run -d "$image" on.port=80 id=app2 app.services=ping,status)"