omnitrace-sample (#169)

- `omnitrace-sample` executable which executes sampling (no
instrumentation)
- fixes bug with OMPT ignoring value of `OMNITRACE_USE_OMPT`
- fixes some issues with sampling duration
- new `OMNITRACE_SAMPLING_INCLUDE_INLINES` configuration variable
- restricts process-sampling to 100 interrupts/sec when inheriting value
from `OMNITRACE_SAMPLING_FREQ`
- `OMNITRACE_PROCESS_SAMPLING_FREQ` still supports up to 1000
interrupts/sec
- fixes bug with colorized log not truly being disabled in all instances
- adds tests for `omnitrace-sample`
- adds tests for sampling duration
- settings ROCP_TOOL_LIB to libomnitrace-dl throws error
  - rocprofiler does not configure correctly when this is done
- Quiet numa_gotcha warnings
- Fixed some shadowed variables

source/lib/omnitrace/library/components/fork_gotcha.cpp

@@ -45,6 +45,7 @@ fork_gotcha::configure()
 void
 fork_gotcha::audit(const gotcha_data_t&, audit::incoming)
 {
+    tim::set_env("OMNITRACE_PRELOAD", "0", 1);
     OMNITRACE_VERBOSE(1, "fork() called on PID %i (rank: %i), TID %li\n",
                       process::get_id(), dmp::rank(), threading::get_id());
     OMNITRACE_BASIC_DEBUG(