tests/int: rename a variable

Rename CGROUP_PATH to CGROUP_V2_PATH so it is more clear that it can
only be used for CGROUP_V2, and to resolve ambiguity with CGROUP_PATH
variable used in tests/rootless.sh.

Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>

tests/integration/cgroups.bats

@@ -386,7 +386,7 @@ function setup() {
 		FREEZER="${FREEZER_DIR}/freezer.state"
 		STATE="FROZEN"
 	else
-		FREEZER_DIR="${CGROUP_PATH}"
+		FREEZER_DIR="${CGROUP_V2_PATH}"
 		FREEZER="${FREEZER_DIR}/cgroup.freeze"
 		STATE="1"
 	fi

tests/integration/delete.bats

@@ -157,7 +157,7 @@ EOF
 	[[ "$output" =~ [0-9]+ ]]
 
 	# check create subcgroups success
-	[ -d "$CGROUP_PATH"/foo ]
+	[ -d "$CGROUP_V2_PATH"/foo ]
 
 	# force delete test_busybox
 	runc delete --force test_busybox
@@ -166,5 +166,5 @@ EOF
 	[ "$status" -ne 0 ]
 
 	# check delete subcgroups success
-	[ ! -d "$CGROUP_PATH"/foo ]
+	[ ! -d "$CGROUP_V2_PATH"/foo ]
 }

tests/integration/helpers.bash

@@ -220,7 +220,7 @@ function set_cgroups_path() {
 
 	# Absolute path to container's cgroup v2.
 	if [ -v CGROUP_V2 ]; then
-		CGROUP_PATH=${CGROUP_BASE_PATH}${REL_CGROUPS_PATH}
+		CGROUP_V2_PATH=${CGROUP_BASE_PATH}${REL_CGROUPS_PATH}
 	fi
 
 	[ -v pod ] && create_parent
@@ -233,7 +233,7 @@ function set_cgroups_path() {
 #  $1: controller name (like "pids") or a file name (like "pids.max").
 function get_cgroup_path() {
 	if [ -v CGROUP_V2 ]; then
-		echo "$CGROUP_PATH"
+		echo "$CGROUP_V2_PATH"
 		return
 	fi