Added new test cast for os install and bootme

Added error checking to "Install HTX On Redhat"

Change-Id: Ieeafb5a04ad466cfabeaf72d58274432112116db
Signed-off-by: Joy Onyerikwu <onyekachukwu.joy.onyerikwu@ibm.com>
diff --git a/syslib/utils_install.robot b/syslib/utils_install.robot
index 4f1d37e..cb71dd3 100755
--- a/syslib/utils_install.robot
+++ b/syslib/utils_install.robot
@@ -78,9 +78,11 @@
     #            (e.g. http://server.com/projects/htx_package.rpm )
 
 
-    OS Execute Command  wget ${htx_rpm}  ignore_err=1
+    ${stdout}  ${stderr}  ${rc}  OS Execute Command
+    ...  wget ${htx_rpm}  ignore_err=1
+    Should Not Contain  ${stderr}  ERROR
     @{str}=  Split String From Right  ${htx_rpm}  /  1
-    SSHLibrary.File Should Exist  ${str[1]}
+
     # Remove the old version.
     OS Execute Command  rpm -e `rpm -qa | grep htx`  ignore_err=1
     OS Execute Command  rpm -Uvh ${str[1]}