Fix sanity_tests run for the top-level CMakeLists

[ienkovich]

Currently, we have to use omniscidb/CMakeLists.txt directly to build and run sanity tests mostly due to relative paths used in tests to reach the test data and runtime libs.

This PR introduces a few changes to enable tests run from the top-level build dir:

• configure data files and headers (for UdfTest) paths through macroses
• allow alternative java classpath to properly find calcite library
• do not force static sqlite library to avoid multiple global sqlite states linked into different shared libraries (causing segfaults on testing)
• enforce -O0 for debug build (we had a similar patch for omnisci fork)
• avoid unexpected dependencies for Shared on IR library through toString method
• avoid unexpected dependencies for Util library through globals by excluding unused code from build (don't completely remove it to probably move part of it to ConfigBuilder later)

@kurapov-peter This PR finally allows us to build and run sanity_tests for HDK from any place, not necessarily from the dir created at the top of the source tree.

[alexbaden]

Looks fine, some comments inline.

[kurapov-peter]

Looks great, thanks!