feat(runner): load service by matched path

[0x0a0d]

I have written about this problem with env SERIVCES: moleculerjs/site#160
I think SERVICES should first prefer to service's name
This pull will allow loading service from SERVICES if any service's file ends with {SERVICE_ENV_VALUE}.service.[tj]s

[icebob]

Could you write an exact example where the original code doesn't load the desired files?

[0x0a0d]

Example:

.
└── src/
    └── services/
        └── counter/
            ├── counter-peter.service.js
            └── counter-marry.service.js

With SERVICEDIR=src/services

• SERVICES=counter-marry, there are no service found
• But SERVICES=counter will load both counter-peter, counter-marry (all *.service.js in counter folder)