build: Fixed docker builds

* fixed Boost c++ standard
* build with docker on mac
* added mail script
* fixed cxx index sample test on mac
* disabled gradle source group test for linux docker builds

script/extract_mail.sh

@@ -0,0 +1,28 @@
+#!/bin/sh
+
+OUTPUT="csv.txt"
+touch $OUTPUT
+echo "NAME\tMAIL\tDATE" > $OUTPUT
+
+for FILE in ./*.eml
+do
+	TEST=$(grep -E -o "test license" $FILE)
+	INVITE=$(grep -E -o "invited" $FILE)
+	UPGRADE=$(grep -E -o "Upgrade" $FILE)
+
+	MAIL=$(grep -E -o "^To: [A-Za-z0-9._%+-]*@[A-Za-z0-9.-]+\.[A-Za-z]{2,6}" $FILE | sed  's .\{4\}  ')
+	NAME=$(grep -E -o "<p>Hello .*,</p>" $FILE | sed 's .\{9\}  ' | sed 's .\{5\}$  ' | sed 's/=/\\x/g')
+	DATE=$(grep -E -o "Delivery-date: .*" $FILE | sed 's .\{20\}  ' | sed 's .\{15\}$  ')
+
+	RECORD="$NAME\t$MAIL"
+
+	# if [[ ! -z "$INVITE" ]]
+	# if [[ ! -z "$UPGRADE" ]]
+	if [[ ! -z "$TEST" ]]
+	then
+		RECORD="$RECORD\t$DATE"
+
+	    echo $RECORD
+	    echo $RECORD >> $OUTPUT
+	fi
+done