Limit communication of group state to actually changed vectors

[vkip]

Also: Renames 'currentWellRates' in WellState to reflect that these are actually only used for guide rates.

[vkip]

jenkins build this please

[vkip]

jenkins build this please

[vkip]

benchmark please

[ytelses]

Benchmark result overview:

Test	Configuration	Relative
opm-git	OPM Benchmark: drogon - Threads: 1	1.008
opm-git	OPM Benchmark: drogon - Threads: 8	1.138
opm-git	OPM Benchmark: punqs3 - Threads: 1	1.024
opm-git	OPM Benchmark: punqs3 - Threads: 8	0.993
opm-git	OPM Benchmark: smeaheia - Threads: 1	1.002
opm-git	OPM Benchmark: smeaheia - Threads: 8	1
opm-git	OPM Benchmark: spe10_model_1 - Threads: 1	1.005
opm-git	OPM Benchmark: spe10_model_1 - Threads: 8	1.003
opm-git	OPM Benchmark: flow_mpi_extra - Threads: 1	1.012
opm-git	OPM Benchmark: flow_mpi_extra - Threads: 8	0.989
opm-git	OPM Benchmark: flow_mpi_norne - Threads: 1	1.017
opm-git	OPM Benchmark: flow_mpi_norne - Threads: 8	1.01
opm-git	OPM Benchmark: flow_mpi_norne_4c_msw - Threads: 1 - FOPT (Total Oil Production At End Of Run)	1
opm-git	OPM Benchmark: flow_mpi_norne_4c_msw - Threads: 8 - FOPT (Total Oil Production At End Of Run)	0.996

• Speed-up = Total time master / Total time pull request. Above 1.0 is an improvement. *

View result details @ https://www.ytelses.com/opm/?page=result&id=2648