Add error descriptions for resource file loader

@@ -98,8 +98,8 @@ Get Broker Property By Username
 Завантажуємо бібліотеку з реалізацією для майданчика ${keywords_file}
   ${bundled_st}=  Run Keyword And Return Status  Import Resource  ${CURDIR}/brokers/${keywords_file}.robot
   ${external_st}=  Run Keyword And Return Status  Import Resource  ${CURDIR}/../../src/robot_tests.broker.${keywords_file}/${keywords_file}.robot
-  Should Be True  ${bundled_st} or ${external_st}
-  Should Not Be True  ${bundled_st} and ${external_st}
+  Run Keyword If  ${bundled_st} == ${external_st} == ${False}  Fail  Resource file ${keywords_file}.robot not found
+  Run Keyword If  ${bundled_st} == ${external_st} == ${True}  Fail  Resource file ${keywords_file}.robot found in both brokers/ and src/
 
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 Дочекатись синхронізації з майданчиком