TEL-26: Percona Telemetry Component unit tests added

Post push fix.

1. Added missing Boost dependency. It caused unit tests build to fail
if no Boost was installed in system.
2. Removed unnecessary component dependency. It caused unit tests
build to fail if configured with WITH_PERCONA_TELEMETRY=NO

Author: kamil-holubicki

unittest/gunit/components/percona_telemetry/CMakeLists.txt

@@ -21,6 +21,8 @@ ENDIF()
 
 INCLUDE_DIRECTORIES(SYSTEM
   ${GMOCK_INCLUDE_DIRS}
+  ${BOOST_PATCHES_DIR}
+  ${BOOST_INCLUDE_DIR}
 )
 
 SET(PERCONA_TELEMETRY_COMPONENT_SRC
@@ -37,7 +39,7 @@ SET(TESTS
   )
 
 FOREACH(test ${TESTS})
-  MYSQL_ADD_EXECUTABLE(${test}-t ${PERCONA_TELEMETRY_COMPONENT_SRC} ${LOCAL_MOCK_SRC} ${test}-t.cc ADD_TEST ${test} LINK_LIBRARIES ${PERCONA_TELEMETRY_COMPONENT_LIBS} DEPENDENCIES component_percona_telemetry)
+  MYSQL_ADD_EXECUTABLE(${test}-t ${PERCONA_TELEMETRY_COMPONENT_SRC} ${LOCAL_MOCK_SRC} ${test}-t.cc ADD_TEST ${test} LINK_LIBRARIES ${PERCONA_TELEMETRY_COMPONENT_LIBS})
   TARGET_LINK_LIBRARIES(${test}-t mysys gunit_small)
 ENDFOREACH()