Remove unused rubygems

Details:

  - rubygem-eventmachine (replaced by rubygem-bunny)
  - rubygem-popen4 (replaced by original Ruby standard library from 2.0)
  - rubygem-open4 (need only by popen4);
  - rubygem-Platform (need only by popen4)

Change-Id: I34fb893afae031a8d8a4a1e5ec7935cf3cd7a496
Closes-Bug: #1529662

docker/astute/setup.sh

@@ -30,8 +30,8 @@ yum update -y
 
 packages="psmisc python-editor nailgun-mcagents sysstat "
 packages+="rubygem-amqp rubygem-amq-protocol rubygem-i18n rubygem-tzinfo "
-packages+="rubygem-minitest rubygem-open4 rubygem-Platform rubygem-symboltable "
-packages+="rubygem-thread_safe rubygem-eventmachine fuel-agent"
+packages+="rubygem-minitest rubygem-symboltable "
+packages+="rubygem-thread_safe fuel-agent"
 
 echo $packages | xargs -n1 yum install -y
 

docker/fuel-centos-build/fuel-centos.ks

@@ -134,7 +134,6 @@ rubygem-amqp
 rubygem-mcollective-client
 rubygem-symboltable
 rubygem-rest-client
-rubygem-popen4
 rubygem-raemon
 rubygem-net-ssh
 rubygem-net-ssh-gateway
@@ -202,7 +201,7 @@ rm -f /sbin/sln
 #  ldconfig
 rm -rf /etc/ld.so.cache
 rm -rf /var/cache/ldconfig/*
-rm -rf /var/cache/yum/* 
+rm -rf /var/cache/yum/*
 
 # Suppress hiera warnings
 mkdir -p /etc/puppet /var/lib/fuel/ibp

requirements-rpm.txt

@@ -213,7 +213,6 @@ rubygem-activesupport
 rubygem-amq-protocol
 rubygem-bunny
 rubygem-cstruct
-rubygem-eventmachine
 rubygem-extlib
 rubygem-ffi
 rubygem-ffi-yajl
@@ -233,10 +232,7 @@ rubygem-net-ssh
 rubygem-net-ssh-gateway
 rubygem-net-ssh-multi
 rubygem-ohai
-rubygem-open4
 rubygem-openstack
-rubygem-Platform
-rubygem-popen4
 rubygem-raemon
 rubygem-rdoc
 rubygem-rest-client