Issue 87 execute tests with GitHub ci (#234)

* Enable lcov coverage in unit testing via cmake.

* fix pipeline build error

* add compile options for unit test to silence some warnings

* remove all BAC_TEST unit tests in src/bacnet/ folder. They are now in test/bacnet/ folders using ztest.

* removed key.c - only used for unit test.

* produce XML test result output for parsing

* produce junit XML test result output

* change lint workflow to quality

* update readme badge for quality results

Co-authored-by: Steve Karg <skarg@users.sourceforge.net>

test/ztest/include/tc_util.h

@@ -92,7 +92,9 @@ static inline const char *TC_RESULT_TO_STR(int result)
 	}
 }
 
+#if 0
 static uint32_t tc_start_time;
+#endif
 static uint32_t tc_spend_time;
 
 static inline void get_start_time_cyc(void)