Update conda to the latest version 4.5.11

Author: Bruno Alla

Dockerfile

@@ -11,7 +11,7 @@ ENV LANG C.UTF-8
 ENV PYTHON_VERSION_27 2.7.14
 ENV PYTHON_VERSION_35 3.5.5
 ENV PYTHON_VERSION_36 3.6.4
-ENV CONDA_VERSION 4.5.4
+ENV CONDA_VERSION 4.5.11
 LABEL python.version_27=$PYTHON_VERSION_27
 LABEL python.version_35=$PYTHON_VERSION_35
 LABEL python.version_36=$PYTHON_VERSION_36