remove manager classes

The value added by these classes is minimal and lowers the flexibility
available to clients using them when it comes to packaging.

Rename recipe virtuals - obmc-phosphor seems redundant.
Align package virtual names with best practices (virtual-package).

Change-Id: I34c3cb03f6b1d2aaa734ed02078b388667f70917
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/common/recipes-phosphor/system/obmc-phosphor-sysd.bb b/common/recipes-phosphor/system/obmc-phosphor-sysd.bb
index bcb5d32..7a21c2f 100644
--- a/common/recipes-phosphor/system/obmc-phosphor-sysd.bb
+++ b/common/recipes-phosphor/system/obmc-phosphor-sysd.bb
@@ -2,8 +2,10 @@
 DESCRIPTION = "Phosphor OpenBMC system management reference implementation."
 PR = "r1"
 
-inherit obmc-phosphor-system-mgmt
 inherit obmc-phosphor-pydbus-service
 
+PROVIDES += "virtual/obmc-system-mgmt"
+RPROVIDES_${PN} += "virtual-obmc-system-mgmt"
+
 S = "${WORKDIR}"
 SRC_URI += "file://${PN}.py"