Option to specify tenant id

[pksorensen]

Right now if just giving url it has no idea which tenant it belongs to.

      "environmentVariables": {
        "DataverseUrl": "https://eifo-dev.crm4.dynamics.com/",
        "DataverseSolutionNames": "eifo"
      }

which allow it to just get a token and then fails later

We should properly add option to set tenantid.

[pksorensen]

Solved in #13

[magesoe]

Merged #13

[magesoe]

Missed that it added a requirement for tenant id to the previous behavior. Reverted such that existing builds are not broken