Merge branch 'develop' into openfoam4

* develop: (65 commits)
  Add comment
  Don't use oparch in Mesa
  Removed GCCcore subtoolchain from Autotools dependency, as using --minimal-toolchains will use subtoolchains automatically.
  Bump libGLU to new mesa too
  Bump Mesa to 12.0.2
  Remove rotortest from testlist
  Remove optarch statement in toolchainopts
  FFTW 3.3.5 with gompi 2016.07 toolchain
  fix checking of dumped easyconfig
  use %(perlver)s rather than %(pyver)s in YAML-Syck easyconfigs
  significantly speed up verifying dumped easyconfig by resorting to 'shallow' parsing
  remove empty versionsuffix in Perl dep spec in YAML-Syck easyconfigs + use %(pyver)s
  HPL 2.2 test for foss 2016.07
  Forgot to change string substitution args
  Made requested changes Changed Open MPI version to 1.10.3, removed duplicate patch, removed mirror link and fixed some style issues.
  Removed hard-coded dep
  missed numactl off list
  foss 2016.07 toolchain (uses GCC 6.1.0)
  First complete fileset for an pomkl, using openmpi 1.10.4 and mkl 11.3.3.210
  use updated Libint easyblock
  ...