Added tests for code coverage

Fixes for gcc4.4

Optimize generate_projects

Coreclr compatible DefaultSslRootsOverride.cs

Injectable test credentials provider interface.

Timer->UsageTimer consistently

Remove outdated ref to openssl from Mac INSTALL instructions

Fix name of report.xml in zip execution

redo the nanopb upgrade

Properly initialize TLS var

Use traditional Bourne shell syntax for piping stdout and stderr

Add a sanity test to ensure that name aliasing rules are obeyed

Bourne shell syntax, not Bash syntax. Change "|&" to "2>&1 |" since that's the
traditional way to redirect stdout and stderr to a pipe

PHP: simplify installation

Run tests improvements

cleanup gens/ directory after nanopb check