Fixes #3748

The local variable my_info is not initialized for all ranks where condition "if (fca_module->local_proc_idx == 0)" is false. Initialize variables to avoid the situation.

Thanks to aryzhikh for the problem report and initial patch.
Fixes #3749: Move r29113 to v1.7.3 (MPI_is_thread_main)

---svn-pre-commit-ignore-below---

r29113 [[BR]]
Fix the bug where MPI_is_thread_main returns true for all
threads when not in MPI_THREAD_MULTIPLE mode.
Thanks to Lisandro Dalcin for pointing it out.
Fixes #3751: Move r29119 to v1.7 branch (obtain vm nodes from rankfile)

---svn-pre-commit-ignore-below---

r29119 [[BR]]
Use the rankfile to obtain list of nodes for VM launch if/when rankfile is given.

cmr:v1.7.3:reviewer=jsquyres:subject=Obtain VM nodes from rankfile