hg: jmc/jmc: JMC-6113: enable gpg-sign only for deploy phase

[guru.hb at oracle.com]

Changeset: c178c31fdcf2
Author:    ghb
Date:      2018-08-13 10:39 +0530
URL:       http://hg.openjdk.java.net/jmc/jmc/rev/c178c31fdcf2

JMC-6113: enable gpg-sign only for deploy phase
Reviewed-by: jdv,sballal

! core/org.openjdk.jmc.agent/pom.xml
! core/org.openjdk.jmc.common/pom.xml
! core/org.openjdk.jmc.flightrecorder.rules.jdk/pom.xml
! core/org.openjdk.jmc.flightrecorder.rules/pom.xml
! core/org.openjdk.jmc.flightrecorder/pom.xml