updated path to yum-config-manager

tasks/with_no_proxy.yml

diff --git a/tasks/with_no_proxy.yml b/tasks/with_no_proxy.yml
index 84f7cf4..ab2eb2a 100644
--- a/tasks/with_no_proxy.yml
+++ b/tasks/with_no_proxy.yml
@@ -1,7 +1,7 @@
 ---
 # tasks file for apigee-opdk-setup-os
 - name: Configure AWS AMI OS package manager repositories for Apigee
-  shell: "yum-config-manager --enable rhui-REGION-rhel-server-extras rhui-REGION-rhel-server-optional"
+  shell: "/usr/bin/yum-config-manager --enable rhui-REGION-rhel-server-extras rhui-REGION-rhel-server-optional"
   when: ansible_bios_version | lower | search('amazon') and ansible_os_family | lower == 'redhat' and ansible_distribution_major_version | version_compare('6', '>')
 
 # TODO: Look up the ansible_distribution name for RHEL systems

tasks/with_proxy.yml

diff --git a/tasks/with_proxy.yml b/tasks/with_proxy.yml
index 41150fc..952cf39 100644
--- a/tasks/with_proxy.yml
+++ b/tasks/with_proxy.yml
@@ -1,7 +1,7 @@
 ---
 
 - name: Configure AWS AMI OS package manager repositories for Apigee
-  shell: "yum-config-manager --enable rhui-REGION-rhel-server-extras rhui-REGION-rhel-server-optional"
+  shell: "/usr/bin/yum-config-manager --enable rhui-REGION-rhel-server-extras rhui-REGION-rhel-server-optional"
   when: ansible_bios_version | lower | search('amazon') and ansible_os_family | lower == 'redhat' and ansible_distribution_major_version | version_compare('6', '>')
 
 # TODO: Look up the ansible_distribution name for RHEL systems