automation/ant/build_rtb_release.xml tweaked to mail release

Can be a personal preference, I changed the release notes mailing to show the release notes and attach the log.

The release notes are more interesting for most product managers. Could be a problem for large releases but I intend to run this at least weekly

change in automation/ant/build_rtb_release.xml.

        <!-- make sure that if the property has not been set for some reason, that we set it to blank - so that the mail below does not fail -->
        <property name="RtbReleaseReport" value="" />

        <if>
            <istrue value="${RtbReleaseMailResult}" />
            <then>
                <!--
                <loadfile property="BuildLogContent" srcFile="${BuildLogDir}/${BuildLogFilename}" failonerror="false" />
                -->
                <loadfile property="RtbReleaseReport.txt" srcFile="${RtbReleaseReport}" />
                <sendMail mail.user="${MailUser}"
                          mail.password="${MailUserPassword}"
                          mail.host.server="${MailHostServer}"
                          mail.host.port="${MailHostPort}"
                          mail.subject="${input.RtbReleaseWspaceId} - Release results"
                          mail.from.address="${MailFromAddress}"
                          mail.to.address="${MailToAddress}"
                          mail.enable.start.tls="${MailHostEnableStartTLS}"
                          mail.ssl="${MailUseSSL}"
                          mail.message="A release build was run in workspace ${input.RtbReleaseWspaceId}: ${start.DSTAMP} ${start.TSTAMP}:${LF}${RtbReleaseReport.txt}"
                          mail.files="${BuildLogDir}/${BuildLogFilename}" />
            </then>
        </if>

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