Resolve "rename poisson_libisf_oct to poisson_psolver_oct"
Description
This MR is one task related to #277, aiming at updating the support of the PSOLVER library. This MR does not yet rename HAVE_LIBISF to HAVE_PSOLVER_1_7, in order not to break the tests for other branches (due to the required change of the reference config.h).
The renaming will be done when also the new PSOLVER_1_8 toolchain will be added to the buildbot, as that also will required a change in the reference.
News snippet
This MR is one task related to #277, aiming at updating the support of the PSOLVER library
Checklist
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I have checked that my code follows the Octopus coding standards -
I have added tests for all the new features added in this request.
Closes #278 (closed)
Edited by Martin Lueders