recipes: update for PYPI_PACKAGE change

The pypi class has slightly changed the semantics of the PYPI_PACKAGE
variable[1], now PYPI_PACKAGE is the normalised package name and the new
variable PYPI_PACKAGE_SDIST is used when the source tarball doesn't match.

Update recipes as appropriate: this is mostly deleting now-redundant
assignments but some assignments are still needed where packages are not
uploaded using the modern standards.

[1] oe-core 98049bf86b6 ("classes/pypi: change PYPI_PACKAGE to be normalised")

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Khem Raj <khem.raj@oss.qualcomm.com>

meta-python/recipes-devtools/python/python3-u-msgpack-python_2.8.0.bb

@@ -7,6 +7,8 @@ SRC_URI[sha256sum] = "b801a83d6ed75e6df41e44518b4f2a9c221dc2da4bcd5380e3a0feda52
 
 inherit pypi setuptools3 ptest-python-pytest
 
+PYPI_PACKAGE_SDIST = "u-msgpack-python"
+
 do_install_ptest:append() {
        cp -f ${S}/test_umsgpack.py ${D}${PTEST_PATH}/
 }