Add implementation capacity for drive interface

This will set the capacity property when the eStoraged object is
created. This change does not expect the drive size to change.

Change-Id: I72cd68c5045e9ef49939f4655a223a02234c7434
Signed-off-by: John Edward Broadbent <jebr@google.com>
diff --git a/src/test/estoraged_test.cpp b/src/test/estoraged_test.cpp
index e77d4c6..e7ad562 100644
--- a/src/test/estoraged_test.cpp
+++ b/src/test/estoraged_test.cpp
@@ -43,6 +43,7 @@
   public:
     const char* testFileName = "testfile";
     const char* testLuksDevName = "testfile_luksDev";
+    uint64_t testSize = 24;
     std::ofstream testFile;
     std::unique_ptr<estoraged::EStoraged> esObject;
     const char* testPath = "/test/openbmc_project/storage/test_dev";
@@ -97,8 +98,8 @@
         mockFsIface = fsIface.get();
 
         esObject = std::make_unique<estoraged::EStoraged>(
-            bus, testPath, testFileName, testLuksDevName, std::move(cryptIface),
-            std::move(fsIface));
+            bus, testPath, testFileName, testLuksDevName, testSize,
+            std::move(cryptIface), std::move(fsIface));
     }
 
     void TearDown() override