Creates unittests for addrman, makes addrman testable.

Adds several unittests for addrman to verify it works as expected.
Makes small modifications to addrman to allow deterministic and targeted tests.

Signed-off-by: Simon <simon@bitcartel.com>

src/Makefile.test.include

@@ -34,6 +34,7 @@ GENERATED_TEST_FILES = $(JSON_TEST_FILES:.json=.json.h) $(RAW_TEST_FILES:.raw=.r
 BITCOIN_TESTS =\
   test/arith_uint256_tests.cpp \
   test/bignum.h \
+  test/addrman_tests.cpp \
   test/alert_tests.cpp \
   test/allocator_tests.cpp \
   test/base32_tests.cpp \