Rename getPSUInventoryPath to getPSUInventoryPaths

Rename the utils method/function getPSUInventoryPath() to
getPSUInventoryPaths().  The method/function returns multiple paths in a
vector, so the name should be plural.  This will make the return type
more clear.  Currently the name implies only one path will be returned.

Tested:
* Verified all automated tests build and run successfully
* Verified getPSUInventoryPaths() returns correct data

Change-Id: I7e215c37e3ce1eb27313bc51348c7f7335c8f67a
Signed-off-by: Shawn McCarney <shawnmm@us.ibm.com>
diff --git a/src/item_updater.cpp b/src/item_updater.cpp
index aea02ee..2760245 100644
--- a/src/item_updater.cpp
+++ b/src/item_updater.cpp
@@ -394,7 +394,7 @@
 {
     try
     {
-        auto paths = utils::getPSUInventoryPath(bus);
+        auto paths = utils::getPSUInventoryPaths(bus);
         for (const auto& p : paths)
         {
             try
@@ -558,7 +558,7 @@
     const auto& activation = it->second;
     const auto& assocs = activation->associations();
 
-    auto paths = utils::getPSUInventoryPath(bus);
+    auto paths = utils::getPSUInventoryPaths(bus);
     for (const auto& p : paths)
     {
         // If there is a present PSU that is not associated with the latest