Config store - revert to working sha

0xc0170 · 0xc0170 · commit f91b40ed437f · 2016-05-26T10:57:40.000+01:00
The commit 14e235a broke tests (config store does not compile anymore).
diff --git a/core/configuration-store.lib b/core/configuration-store.lib
@@ -1 +1 @@
-https://github.com/ARMmbed/configuration-store/#479cd1f033828d1577669d1f01eb56ce6f559cfd
+https://github.com/ARMmbed/configuration-store/#f0a4c07cce8c84513f528e5939c5a1469385d2a8

Original file line number	Diff line number	Diff line change
`@@ -1 +1 @@`
`1`		`-https://github.com/ARMmbed/configuration-store/#479cd1f033828d1577669d1f01eb56ce6f559cfd`
	`1`	`+https://github.com/ARMmbed/configuration-store/#f0a4c07cce8c84513f528e5939c5a1469385d2a8`