HPC-9088: Use default container names

Compose generates container names based on the
project name, service name, and scale/replica count.

In Compose V1, an underscore (_) was used as the word separator.
In Compose V2, a hyphen (-) is used as the word separator.
https://docs.docker.com/compose/migrate/#service-container-names

Since existing container names aren't used anywhere else,
just remove them and use default names

compose.integrated.yaml

@@ -1,6 +1,5 @@
 services:
   api:
-    container_name: hpc_api
     build:
       context: .
       dockerfile: ./env/api/Dockerfile

compose.yaml

@@ -1,6 +1,5 @@
 services:
   api:
-    container_name: hpc_api
     build:
       context: .
       dockerfile: ./env/api/Dockerfile
@@ -26,7 +25,6 @@ services:
       - db
   db:
     image: postgres:11.7
-    container_name: hpc_postgres_db
     environment:
       - POSTGRES_PASSWORD=demo
       - POSTGRES_USER=demo