Update args to handle cloud being default start mode

dev-docs/running-in-docker.adoc

@@ -8,7 +8,7 @@ To run Solr in a container and expose the Solr port, run:
 
 In order to start Solr in cloud mode, run the following.
 
-`docker run -p 8983:8983 solr solr-fg -c`
+`docker run -p 8983:8983 solr solr-fg`
 
 For documentation on using the official docker builds, please refer to the https://hub.docker.com/_/solr[DockerHub page].
 Up-to-date documentation for running locally built images of this branch can be found in the xref:_running_solr_in_docker[local reference guide].
@@ -30,4 +30,4 @@ For more info on building an image, run:
 `./gradlew helpDocker`
 
 == Additional Information
-You can find additional information in the https://solr.apache.org/guide/solr/latest/deployment-guide/solr-in-docker.html[Solr Ref Guide Docker Page]
+You can find additional information in the https://solr.apache.org/guide/solr/latest/deployment-guide/solr-in-docker.html[Solr Ref Guide Docker Page]

solr/docker/scripts/solr-create

@@ -75,4 +75,4 @@ else
     fi
 fi
 
-exec solr-fg
+exec solr-fg --user-managed

solr/docker/scripts/solr-demo

@@ -50,4 +50,4 @@ else
     fi
 fi
 
-exec solr-fg
+exec solr-fg --user-managed

solr/docker/scripts/solr-fg

@@ -36,9 +36,9 @@ if [[ -z "${TINI:-}" ]]; then
   fi
 fi
 if [[ "$TINI" == yes ]]; then
-  exec tini -- solr start --user-managed -f "$@"
+  exec tini -- solr start -f "$@"
 elif [[ "$TINI" == no ]]; then
-  exec solr start --user-managed -f "$@"
+  exec solr start -f "$@"
 else
   echo "invalid value TINI=$TINI"
   exit 1

solr/docker/scripts/solr-precreate

@@ -36,4 +36,4 @@ source run-initdb
 
 precreate-core "$@"
 
-exec solr-fg
+exec solr-fg --user-managed

solr/docker/tests/cases/cloud_multi_node_embedded_zk/test.sh

@@ -20,7 +20,7 @@ TEST_DIR="${TEST_DIR:-$(dirname -- "${BASH_SOURCE[0]}")}"
 source "${TEST_DIR}/../../shared.sh"
 
 echo "Running base solr node w/embeddedZk - $container_name"
-docker run --name "${container_name}" -d "$tag" solr-fg -c
+docker run --name "${container_name}" -d "$tag" solr-fg
 
 wait_for_container_and_solr "${container_name}"
 
@@ -32,7 +32,7 @@ container_cleanup "${container_name}-2"
 echo "Running additional solr node - $container_name-2"
 docker run --name "$container_name-2" -d \
   --env "ZK_HOST=${solr_ip}:9983" \
-  "$tag" solr-fg -c
+  "$tag" solr-fg
 
 wait_for_container_and_solr "${container_name}-2"
 

solr/docker/tests/cases/user_volume/test.sh

@@ -62,7 +62,7 @@ docker run \
   -v "$mylogs:/var/solr/logs" \
   --user "$(id -u):$(id -g)" \
   --name "$container_name" \
-  -d "$tag"
+  -d "$tag" --user-managed
 
 wait_for_container_and_solr "$container_name"