Patroni 1.4.4 and migrate to ubuntu:18.04 (#226)

Since it already has patroni package we will install most of the dependencies as ubuntu packages.
Unfortunately some of the postgres packages must be rebuilt from sources, because they exist only for postgresql-10

postgres-appliance/dependencies/Dockerfile

@@ -1,11 +1,9 @@
-FROM ubuntu:16.04
+FROM ubuntu:18.04
 
 MAINTAINER Alexander Kukushkin <alexander.kukushkin@zalando.de>
 
-#ENV SOURCES="cgal sfcgal gdal r-base"
-ENV SOURCES="cgal sfcgal gdal"
-#ENV PACKAGES="libcgal11v5 libsfcgal1 libgdal1i r-base-core"
-ENV PACKAGES="libcgal11v5 libsfcgal1 libgdal1i"
+ENV SOURCES="gdal"
+ENV PACKAGES="libgdal20"
 
 RUN export DEBIAN_FRONTEND=noninteractive \
     && echo 'APT::Install-Recommends "0";' > /etc/apt/apt.conf.d/01norecommend \

postgres-appliance/dependencies/patches/gdal.patch

@@ -1,67 +1,70 @@
---- debian/rules.orig	2016-02-10 16:17:44.000000000 +0000
-+++ debian/rules	2017-11-14 12:14:19.000000000 +0000
-@@ -93,35 +93,42 @@
+--- debian/rules.orig	2018-01-30 06:06:47.000000000 +0000
++++ debian/rules	2018-04-28 11:31:55.013154357 +0000
+@@ -101,38 +101,43 @@
+ 			--with-rename-internal-libtiff-symbols=yes \
  			--with-rename-internal-libgeotiff-symbols=yes \
- 			--with-libtiff=internal \
- 			--with-geotiff=internal \
--			--with-webp \
--			--with-jasper \
--			--with-netcdf \
--			$(WITH_HDF5) \
--			--with-xerces \
-+			--without-grib \
-+			--without-gif \
-+			--without-hdf4 \
-+			--without-xml2 \
-+			--without-expat \
-+			--without-pcre \
-+			--without-jpeg \
-+			--without-png \
-+			--without-webp \
-+			--without-jasper \
-+			--without-netcdf \
-+			--without-xerces \
- 			--with-geos \
--			--with-sqlite3 \
+ 			--with-threads \
+-			--with-armadillo=yes \
++			--with-armadillo=no \
+ 			--with-cfitsio=no \
 -			--with-curl \
--			--with-pg \
++			--with-curl=no \
+ 			--with-ecw=no \
+-			--with-epsilon=/usr \
+-			--with-freexl=yes \
++			--with-epsilon=no \
++			--with-freexl=no \
+ 			--with-geos \
+-			--with-geotiff=yes \
++			--with-geotiff=internal \
+ 			--with-grass=no \
+-			$(WITH_HDF5) \
+ 			--with-libjson-c=/usr \
+-			--with-libkml=yes \
++			--with-libkml=no \
+ 			--with-liblzma=yes \
+-			--with-libtiff=yes \
++			--with-libtiff=internal \
+ 			--with-mrsid=no \
 -			--with-mysql \
--			--with-perl \
-+			--without-sqlite3 \
-+			--without-curl \
-+			--without-pg \
-+			--without-mysql \
-+			--without-perl \
- 			--with-ruby=no \
--			--with-java=/usr/lib/jvm/default-java \
--			--with-python \
+-			--with-netcdf \
 -			--with-odbc \
 -			--with-ogdi \
+-			--with-openjpeg=yes \
+-			--with-pg \
+-			--with-poppler=yes \
+-			--with-qhull=yes \
+-			--with-sosi=yes \
+-			--with-spatialite=/usr \
+-			--with-sqlite3 \
+-			--with-webp \
+-			--with-xerces \
 -			--with-dods-root=/usr \
-+			--without-java \
-+			--without-python \
-+			--without-odbc \
++			--without-mysql \
++			--without-netcdf \
++			--with-odbc=no \
 +			--without-ogdi \
-+			--without-dods \
- 			--with-static-proj4=yes \
--			--with-spatialite=/usr \
-+			--without-spatialite \
- 			--with-cfitsio=no \
- 			--with-ecw=no \
- 			--with-mrsid=no \
--			--with-poppler=yes \
--			--with-openjpeg=yes \
--			--with-freexl=yes \
--			--with-libkml=yes \
--			--with-armadillo=yes \
-+			--with-poppler=no \
++			--without-jpeg12 \
++			--with-jpeg=internal \
++			--with-png=internal \
 +			--with-openjpeg=no \
-+			--with-freexl=no \
-+			--with-libkml=no \
-+			--with-armadillo=no \
- 			--with-liblzma=yes \
--			--with-epsilon=/usr \
-+			--without-epsilon \
- 			CFLAGS="$(CFLAGS)" CXXFLAGS="$(CXXFLAGS)"; \
++			--with-gif=no \
++			--with-hdf4=no \
++			--with-hdf5=no \
++			--without-pg \
++			--with-poppler=no \
++			--with-qhull=no \
++			--with-sosi=no \
++			--with-spatialite=no \
++			--with-sqlite3=no \
++			--with-webp=no \
++			--without-xerces \
++			--with-dods-root=no \
+ 			--with-static-proj4=yes \
+-			--with-java=/usr/lib/jvm/default-java \
+-			--with-perl \
++			--without-java \
++			--without-perl \
+ 			--with-python; \
  		mv GDALmake.opt GDALmake.opt-$$V; \
  	done