Add namespaces to erase methods

Some erase objects did not have the required namespace. This change adds
the estoraged and estoraged_testing namespace where it is needed.

Testing: Not tested
Change-Id: I63757ea4d3672659f21108e5e65fd09aa1c03406
Signed-off-by: John Edward Broadbent <jebr@google.com>
diff --git a/include/erase.hpp b/include/erase.hpp
index 6d5644c..8224003 100644
--- a/include/erase.hpp
+++ b/include/erase.hpp
@@ -1,6 +1,8 @@
 #pragma once
 #include <string>
 
+namespace estoraged
+{
 /** @class Erase
  *  @brief Erase object provides a base class for the specific erase types
  */
@@ -23,3 +25,5 @@
     /* The linux path for the block device */
     std::string devPath;
 };
+
+} // namespace estoraged