Ldap, php-config, phpize 7.2 (#163)

* add php7.2-ldap

* explicitly set update-alternatives php-config and phpize for default version of php

scripts/provision.sh

@@ -58,7 +58,7 @@ php7.2-pgsql php7.2-sqlite3 php7.2-gd \
 php7.2-curl php7.2-memcached \
 php7.2-imap php7.2-mysql php7.2-mbstring \
 php7.2-xml php7.2-zip php7.2-bcmath php7.2-soap \
-php7.2-intl php7.2-readline \
+php7.2-intl php7.2-readline php7.2-ldap \
 php-xdebug php-pear
 
 # PHP 7.1
@@ -89,6 +89,8 @@ php5.6-xml php5.6-zip php5.6-bcmath php5.6-soap \
 php5.6-intl php5.6-readline php5.6-mcrypt
 
 update-alternatives --set php /usr/bin/php7.2
+update-alternatives --set php-config /usr/bin/php-config7.2
+update-alternatives --set phpize /usr/bin/phpize7.2
 
 # Install Composer