Update config under tests/ folder

Fix tests by using "local" setting instead of "local_address" in config.

This is mentioned in:
- https://github.com/shadowsocks/shadowsocks-libev/issues/247

tests/aes-ctr.json

@@ -5,6 +5,6 @@
     "password":"aes_password",
     "timeout":60,
     "method":"aes-256-ctr",
-    "local_address":"127.0.0.1",
+    "local":"127.0.0.1",
     "fast_open":false
 }

tests/aes-gcm.json

@@ -5,6 +5,6 @@
     "password":"aes_password",
     "timeout":60,
     "method":"aes-256-gcm",
-    "local_address":"127.0.0.1",
+    "local":"127.0.0.1",
     "fast_open":false
 }

tests/aes.json

@@ -5,6 +5,6 @@
     "password":"aes_password",
     "timeout":60,
     "method":"aes-256-cfb",
-    "local_address":"127.0.0.1",
+    "local":"127.0.0.1",
     "fast_open":false
 }

tests/chacha20-ietf-poly1305.json

@@ -5,6 +5,6 @@
     "password":"salsa20_password",
     "timeout":60,
     "method":"chacha20-ietf-poly1305",
-    "local_address":"127.0.0.1",
+    "local":"127.0.0.1",
     "fast_open":false
 }

tests/chacha20-ietf.json

@@ -5,6 +5,6 @@
     "password":"salsa20_password",
     "timeout":60,
     "method":"chacha20-ietf",
-    "local_address":"127.0.0.1",
+    "local":"127.0.0.1",
     "fast_open":false
 }

tests/chacha20.json

@@ -5,6 +5,6 @@
     "password":"chacha20_password",
     "timeout":60,
     "method":"chacha20",
-    "local_address":"127.0.0.1",
+    "local":"127.0.0.1",
     "fast_open":false
 }

tests/rc4-md5.json

@@ -5,6 +5,6 @@
     "password":"aes_password",
     "timeout":60,
     "method":"rc4-md5",
-    "local_address":"127.0.0.1",
+    "local":"127.0.0.1",
     "fast_open":false
 }

tests/salsa20.json

@@ -5,6 +5,6 @@
     "password":"salsa20_password",
     "timeout":60,
     "method":"salsa20",
-    "local_address":"127.0.0.1",
+    "local":"127.0.0.1",
     "fast_open":false
 }