Using config manager to create component list instead of 'zwe'

[Gautham-coder]

Using configmgr to read config yaml for enabled components and check for start script in /instance/component-name/manifest, if both are present then add to component list, instead of zwe.

Solution:

1. Check for enabled components
2. for each enabled component check if the manifest.yaml exits either in / components // or /
3. if it exists then read item 'commands.start', if present then add the component to the component list.

Relates to issue: https://github.com/zowe/launcher/issues/110

[1000TurquoisePogs]

So far in my testing this is working for me.