fix misspelling - "simple&#151;a " and "acount"

*section_objectstorage-components.xml:
L164: "Implementing a partition is conceptually simplea partition is ..."
is actually want to say "Implementing a partition is conceptually simple,
a partition is ..."

L230: "acount" -> "account"

backport: none

Change-Id: I55ff60d62d953012eb827e37c7bb7885de024f2b
Closes-Bug: #1278753
Merge "fix misspelling - "simple&#151;a " and "acount""