added error handling for common troubleshooting tools

tasks/main.yml

diff --git a/tasks/main.yml b/tasks/main.yml
index b8bdfe6..b9d22c5 100644
--- a/tasks/main.yml
+++ b/tasks/main.yml
@@ -1,16 +1,61 @@
 ---
 # tasks file for apigee-opdk-setup-os-common-extra
-#- block:
-- name: Update toubleshooting OS packages
-  become: yes
-  yum:
-    name: "{{ item }}"
-    state: present
-  with_items:
-  - lsof
-  - nc
-  - dos2unix
-  - tcpdump
-  - tree
-  - telnet
-  - vim
+- block:
+  - name: Update toubleshooting OS packages
+    become: yes
+    yum:
+      name: "{{ item }}"
+      state: present
+    with_items:
+    - lsof
+    - nc
+    - dos2unix
+    - tcpdump
+    - tree
+    - telnet
+    - vim
+
+  rescue:
+
+    - name: expose baseurl in epel.repo definition
+      replace:
+         backup: yes
+         regexp: '^(#baseurl=)(.*)'
+         replace: 'baseurl=\2'
+         dest: /etc/yum.repos.d/epel.repo"
+
+    - name: remove mirrorlist in epel.repo definition
+      replace:
+         backup: yes
+         regexp: '^(mirrorlist=)(.*)'
+         replace: '#mirrorlist=\2'
+         dest: /etc/yum.repos.d/epel.repo"
+
+    - name: Update toubleshooting OS packages
+      become: yes
+      yum:
+        name: "{{ item }}"
+        state: present
+      with_items:
+      - lsof
+      - nc
+      - dos2unix
+      - tcpdump
+      - tree
+      - telnet
+      - vim
+
+    - name: remove  baseurl in epel.repo definition
+      replace:
+         backup: yes
+         regexp: '^(baseurl=)(.*)'
+         replace: '#baseurl=\2'
+         dest: /etc/yum.repos.d/epel.repo"
+
+    - name: expose mirrorlist in epel.repo definition
+      replace:
+         backup: yes
+         regexp: '^(#mirrorlist=)(.*)'
+         replace: 'mirrorlist=\2'
+         dest: /etc/yum.repos.d/epel.repo"
+