fix issue with templates defined by deps being required while still parsing deps

[boegel]

This should fix the problems being reported in #1402 and easybuilders/easybuild-easyconfigs#3210.

cc @verdurin, @ocaisa

[boegel]

@verdurin, @ocaisa: I'll look into an test that covers this, but it would be great if you could verify this fix (and review the changes).

[verdurin]

@boegel having manually applied the new version of easyconfig.py then reloaded the module, I tried this:

eb cnvkit-0.7.3-foss-2015b-Python-2.7.10.eb -dr --force --minimal-toolchains --robot ./

and it worked, without generating the errors I reported in easybuilders/easybuild-easyconfigs#3210

[verdurin]

@boegel - can you clarify what you mean by "(for now)" here? This is an interim fix, or just "for now" as part of the dependency resolution process?

[ocaisa]

With minimal-toolchains you might be replacing this toolchain with one further down the hierarchy when the dependencies are finalised. Probably could do with replacing (for now) by (until dependencies are finalised)

[ocaisa]

@boegel Tested with Boost-1.60.0-intel-2016a-Python-2.7.11.eb from the main easyconfig repo and parses everything correctly.

[ocaisa]

lgtm

[wpoely86]

👍

[boegel]

Thanks for the confirmation of the fix @verdurin and @ocaisa, and for the review of the changes!

Going in!