Fix obsolete warnings in generated test code, fixes #337

[dutts]

No description provided.

[angularsen]

Awesome, thanks. I noticed there are still tons of warnings in the build log though, if you want to take a stab at more of them:

Build log: https://ci.appveyor.com/project/angularsen/unitsnet/build/414

Mute this one with a #pragma, since this is by design:

GeneratedCode\Quantities\PressureChangeRate.g.cs(495,30): warning CS0809: Obsolete member 'PressureChangeRate.Equals(object)' overrides non-obsolete member 'object.Equals(object)' [C:\projects\unitsnet\UnitsNet\UnitsNet.NetStandard10.csproj]

Mute this one with a #pragma until we remove these != and == operator overloads in next major release:

GeneratedCode\ElectricResistanceTestsBase.g.cs(170,26): warning CS0618: 'ElectricResistance.operator ==(ElectricResistance, ElectricResistance)' is obsolete: 'It is not safe to compare equality due to using System.Double as the internal representation. It is very easy to get slightly different values due to floating point operations. Instead use Equals(other, maxError) to provide the max allowed error.' [C:\projects\unitsnet\UnitsNet.Tests\UnitsNet.Tests.NetCore.csproj]

GeneratedCode\EnergyTestsBase.g.cs(279,26): warning CS0618: 'Energy.operator !=(Energy, Energy)' is obsolete: 'It is not safe to compare equality due to using System.Double as the internal representation. It is very easy to get slightly different values due to floating point operations. Instead use Equals(other, maxError) to provide the max allowed error.' [C:\projects\unitsnet\UnitsNet.Tests\UnitsNet.Tests.NetCore.csproj]

Mute warnings with #pragma on tests of obsolete units until they are removed, such as:

GeneratedCode\Quantities\TemperatureDelta.g.cs(893,22): warning CS0618: 'TemperatureDeltaUnit.DegreeNewtonDelta' is obsolete: 'Deprecated due to github issue #180, please use DegreeNewton instead' [C:\projects\unitsnet\UnitsNet\UnitsNet.NetStandard10.Signed.csproj]

Next major release TODO list:
#180

[dutts]

Sure, will take a look.