Update poa-bridge-contracts branch on Dockerfile

Author: patitonar

e2e-script/bridge/Dockerfile

@@ -10,5 +10,5 @@ RUN apt-get clean
 RUN git clone https://github.com/poanetwork/bridge-nodejs.git
 WORKDIR /bridge-nodejs
 RUN git fetch && git checkout support-erc20-native-#81
-RUN cd submodules/poa-bridge-contracts && git submodule update --init --recursive && git fetch && git checkout erc20-to-native-#79
+RUN cd submodules/poa-bridge-contracts && git submodule update --init --recursive
 RUN npm install

e2e-script/contracts/Dockerfile

@@ -9,7 +9,7 @@ RUN mkdir submodules && \
   mv poa-bridge-contracts submodules && \
   cd submodules/poa-bridge-contracts && \
   git fetch && \
-  git checkout erc20-to-native-#79
+  git checkout develop
 
 RUN cd submodules/poa-bridge-contracts && \
   npm install && \