Dockerfile.debian*: install libmosquitto-dev package for mqtt module

docker/Dockerfile.debian10

@@ -32,6 +32,7 @@ RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install --assume-ye
   libmnl-dev \
   libmongoc-dev \
   libmono-2.0-dev \
+  libmosquitto-dev \
   libncurses5-dev \
   libpcre3-dev \
   libperl-dev \

docker/Dockerfile.debian9

@@ -33,6 +33,7 @@ RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install --assume-ye
   libmnl-dev \
   libmongoc-dev \
   libmono-2.0-dev \
+  libmosquitto-dev \
   libncurses5-dev \
   libpcre3-dev \
   libperl-dev \