Service-specific config files with module ids with a colon are invalid filenames in Windows

[bertjan]

The deploy-tools allow for service-specific configuration using a config file with a name equal to the module id (groupid:artifactid).
Filenames with a colon are not supported on Windows.
The previous (vertx2) format with a ~ as group/artifact separator did work on windows.

[MarcelTon]

Do want 👍

[msoute]

#43 merged