Upgrade golang 1.6 to 1.7 in chaincode examples

Fix #FAB-1368.

Change-Id: Iffb824f8caa3234fba8de45066160e715ac568bc
Signed-off-by: Baohua Yang <[email protected]>

Author: yeasy

examples/chaincode/go/asset_management02/asset.yaml

@@ -195,7 +195,7 @@ peer:
     networkId: dev
 
     Dockerfile:  |
-        from golang:1.6
+        from golang:1.7
         # Install RocksDB
         RUN cd /opt  && git clone --branch v4.1 --single-branch --depth 1 https://github.com/facebook/rocksdb.git && cd rocksdb
         WORKDIR /opt/rocksdb
@@ -392,7 +392,7 @@ chaincode:
         # This is the basis for the Golang Dockerfile.  Additional commands will
         # be appended depedendent upon the chaincode specification.
         Dockerfile:  |
-            from golang:1.6
+            from golang:1.7
             COPY src $GOPATH/src
             WORKDIR $GOPATH
 

examples/chaincode/go/asset_management_with_roles/asset.yaml

@@ -173,7 +173,7 @@ peer:
     networkId: dev
 
     Dockerfile:  |
-        from golang:1.6
+        from golang:1.7
         # Install RocksDB
         RUN cd /opt  && git clone --branch v4.1 --single-branch --depth 1 https://github.com/facebook/rocksdb.git && cd rocksdb
         WORKDIR /opt/rocksdb
@@ -367,7 +367,7 @@ chaincode:
         # This is the basis for the Golang Dockerfile.  Additional commands will
         # be appended depedendent upon the chaincode specification.
         Dockerfile:  |
-            from golang:1.6
+            from golang:1.7
             COPY src $GOPATH/src
             WORKDIR $GOPATH