Use opts.namespace if it was passed in. Previously, it was ignored.

[sbleon]

Before:

$ pm2 start --namespace foo ecosystem.config.js
[PM2][WARN] Applications background_worker not running, starting...
[PM2] App [background_worker] launched (1 instances)
┌─────┬──────────────────────┬─────────────┬─────────┬─────────┬──────────┬────────┬──────┬───────────┬──────────┬──────────┬──────────┬──────────┐
│ id  │ name                 │ namespace   │ version │ mode    │ pid      │ uptime │ ↺    │ status    │ cpu      │ mem      │ user     │ watching │
├─────┼──────────────────────┼─────────────┼─────────┼─────────┼──────────┼────────┼──────┼───────────┼──────────┼──────────┼──────────┼──────────┤
│ 0   │ background_worker    │ N/A         │ 0.0.1   │ fork    │ 86094    │ 0s     │ 0    │ online    │ 0%       │ 8.5mb    │ leon     │ enabled  │
└─────┴──────────────────────┴─────────────┴─────────┴─────────┴──────────┴────────┴──────┴───────────┴──────────┴──────────┴──────────┴──────────┘

After:

$ pm2 start --namespace foo ecosystem.config.js
[PM2][WARN] Applications background_worker not running, starting...
[PM2] App [background_worker] launched (1 instances)
┌─────┬──────────────────────┬─────────────┬─────────┬─────────┬──────────┬────────┬──────┬───────────┬──────────┬──────────┬──────────┬──────────┐
│ id  │ name                 │ namespace   │ version │ mode    │ pid      │ uptime │ ↺    │ status    │ cpu      │ mem      │ user     │ watching │
├─────┼──────────────────────┼─────────────┼─────────┼─────────┼──────────┼────────┼──────┼───────────┼──────────┼──────────┼──────────┼──────────┤
│ 0   │ background_worker    │ foo         │ 0.0.1   │ fork    │ 86290    │ 0s     │ 0    │ online    │ 0%       │ 9.7mb    │ leon     │ enabled  │
└─────┴──────────────────────┴─────────────┴─────────┴─────────┴──────────┴────────┴──────┴───────────┴──────────┴──────────┴──────────┴──────────┘

Q	A
Bug fix?	yes
New feature?	no
BC breaks?	no
Deprecations?	no
Tests pass?	no, but they're not passing on the development branch for me either
Fixed tickets	#4778
License	MIT
Doc PR	https://github.com/pm2-hive/pm2-hive.github.io/pulls

[ghost]

Anyone here that can look at this? :) Would be much appreciated for me who is waiting for the bug fix :D