Update .gitignore.
Icinga 2 Export: Resolve host/service CVs as (host check) service command arguments.

Refs #2416
Refs #2418
Add 'make install-{basic,config}' not to overwrite config.pm on dev installs.
Merge branch 'fix/i2-export-cv-as-cmd-args-2418' into support/1.4

Fixes #2416
Fixes #2418
Do not dump host/service custom vars as macros.

Requires the Icinga 2 HEAD resolving https://dev.icinga.org/issues/5364

Refs #2416
Refs #2418