GPII-3997: Optionally include documorph merge module into the installer

[javihernandez]

See https://issues.gpii.net/browse/GPII-3997

[gpii-bot]

CI job failed: https://ci.gpii.net/job/gpii-app-tests/752/

[javihernandez]

ok to test

[gpii-bot]

CI job passed: https://ci.gpii.net/job/gpii-app-tests/753/

[javihernandez]

There is a problem here, the source code for the merge module is in a private repo right now because we need consent from DocuMoprh developers to include their code in a public repo of our organization.

[gpii-bot]

CI job failed: https://ci.gpii.net/job/gpii-app-tests/1108/

[javihernandez]

CI job failed: https://ci.gpii.net/job/gpii-app-tests/1108/

npm ERR! path V:\node_modules
npm ERR! code EEXIST
npm ERR! errno -4075
npm ERR! syscall mkdir
npm ERR! EEXIST: file already exists, mkdir 'V:\node_modules'
npm ERR! File exists: V:\node_modules
npm ERR! Move it away, and try again.

ok to test

[gpii-bot]

CI job passed: https://ci.gpii.net/job/gpii-app-tests/1109/