GEOPM service for Caliper

[amarathe84]

This PR is for the GEOPM service that we've developed for Caliper. The GEOPM service for Caliper enables transparently linking the GEOPM runtime system (https://github.com/geopm/geopm) for power management with the application through the Caliper markup API. The service captures region attribute updates and maps them to GEOPM application markups. The service handles updates to both OMP and non-OMP regions. The GEOPM markups are listed on this page: https://geopm.github.io/man/geopm_prof_c.3.html. The mapping between Caliper markups and GEOPM markups is listed in src/services/geopm/doc/GEOPM-mapping.pdf.

[codecov-io]

Codecov Report

Merging #213 into releases/v2.1.1 will not change coverage. The diff coverage is n/a.

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##           releases/v2.1.1     #213   +/-   ##
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  Coverage            75.67%   75.67%           
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  Files                  123      123           
  Lines                 8065     8065           
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  Hits                  6103     6103           
  Misses                1962     1962

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