JIRA: APEX-95
pm_type is already in the sample instackenv.json but wasn't previously
being read.
Change-Id: Ia82c5010481d77d142d4fa3ca6e738558e8e9e4e
(cherry picked from commit 
652104ebd6c0d0baba22ffc6486512ade19c043d)
     node_output="
         {
           \"pm_password\": \"$(eval echo \${${node}ipmi_pass})\",
-          \"pm_type\": \"pxe_ipmitool\",
+          \"pm_type\": \"$(eval echo \${${node}pm_type})\",
           \"mac\": [
             \"$(eval echo \${${node}mac_address})\"
           ],
 
     ipmi_ip: 10.4.7.2
     ipmi_user: root
     ipmi_pass: root
+    pm_type: "pxe_ipmitool"
     cpus: 2
     memory: 8192
     disk: 40
     ipmi_ip: 10.4.7.3
     ipmi_user: root
     ipmi_pass: root
+    pm_type: "pxe_ipmitool"
     cpus: 2
     memory: 8192
     disk: 40
     ipmi_ip: 10.4.7.4
     ipmi_user: root
     ipmi_pass: root
+    pm_type: "pxe_ipmitool"
     cpus: 2
     memory: 8192
     disk: 40
     ipmi_ip: 10.4.7.5
     ipmi_user: root
     ipmi_pass: root
+    pm_type: "pxe_ipmitool"
     cpus: 2
     memory: 8192
     disk: 40
     ipmi_ip: 10.4.7.6
     ipmi_user: root
     ipmi_pass: root
+    pm_type: "pxe_ipmitool"
     cpus: 2
     memory: 8192
     disk: 40
 
     ipmi_ip: 10.4.17.2
     ipmi_user: root
     ipmi_pass: root
+    pm_type: "pxe_ipmitool"
     cpus: 2
     memory: 8192
     disk: 40
     ipmi_ip: 10.4.17.3
     ipmi_user: root
     ipmi_pass: root
+    pm_type: "pxe_ipmitool"
     cpus: 2
     memory: 8192
     disk: 40
     ipmi_ip: 10.4.17.4
     ipmi_user: root
     ipmi_pass: root
+    pm_type: "pxe_ipmitool"
     cpus: 2
     memory: 8192
     disk: 40
     ipmi_ip: 10.4.17.5
     ipmi_user: root
     ipmi_pass: root
+    pm_type: "pxe_ipmitool"
     cpus: 2
     memory: 8192
     disk: 40
     ipmi_ip: 10.4.17.6
     ipmi_user: root
     ipmi_pass: root
+    pm_type: "pxe_ipmitool"
     cpus: 2
     memory: 8192
     disk: 40