fix: import devstack env vars when provisioning ida's (#1061)

Change provision-ida.sh so that on provision it imports environmental
variables like:

- DEVSTACK_WORKSPACE
- COMPOSE_PROJECT_NAME
- COMPOSE_PATH_SEPARATOR
- COMPOSE_FILE

that are defined in Makefile and options.mk.

Before this change, provision would re-create a devstack container that
was not mapped to the user's local machine using COMPOSE_FILE here:

https://github.com/openedx/devstack/blob/fac68ae85b49cc6186d4872c0f3e2bfbc64f98db/provision-ida.sh#L12

Then fail on requirements gathering for course-discovery here:

https://github.com/openedx/devstack/blob/fac68ae85b49cc6186d4872c0f3e2bfbc64f98db/provision-ida.sh#L15

Due to:

- Outdated BASIC authentication credentials provided by the configuration
  repository by default in our devstack images, and

- Not having the user's .git/config file for the repo mapped into the
  container.

Co-authored-by: Alexander Sheehan <asheehan@edx.org>

Author: pshiu

provision-ida.sh

@@ -9,7 +9,7 @@ client_name=$2  # The name of the Oauth client stored in the edxapp DB.
 client_port=$3  # The port corresponding to this IDA service in devstack.
 container_name=${4:-$1} # (Optional) The name of the container.  If missing, will use app_name.
 
-docker-compose up -d $app_name
+make dev.up.$app_name
 
 echo -e "${GREEN}Installing requirements for ${app_name}...${NC}"
 docker-compose exec -T ${container_name}  bash -e -c 'source /edx/app/$1/$1_env && cd /edx/app/$1/$1/ && make requirements' -- "$app_name"