Remove the @Blocking annotation from ProductsResource #35

Job	Run time
list-exercises	2s
build (exercise_000_initial_state)	16s
build (exercise_001_create_a_greeting_service)	27s
build (exercise_002_a_qute_hello_world)	28s
build (exercise_003_qute_products)	20s
build (exercise_004_even_qute_products)	22s
build (exercise_005_products_from_the_database)	36s
build (exercise_006_CDI_and_ArC)	44s
build (exercise_007_Convert_endpoints_to_JSON)	44s
build (exercise_008_Adding_REST_data_Panache)	38s
build (exercise_009_Hook_up_the_React_app)	48s
build (exercise_010_Validation_and_PUT)	46s
build (exercise_011_Going_Reactive)	39s
build (exercise_012_Reactive_search_endpoint)	43s
build (exercise_013_Listen_and_Notify)	45s
build (exercise_014_Internal_Channels)	44s
build (exercise_015_Connecting_to_Kafka)	56s
build (exercise_016_Dead_Letter_Queue_and_Stream_filtering)	58s
summary	1s
	10m 57s

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