lal: drop python-2.6 package support

(cherry picked from commit 304d154099af7263bf8d0a48669486d5cc1ff625)
lal: sl6 packaging updates

(cherry picked from commit 29afab16cf4f5c49e1c359771df6aef5467826eb)
lal: mark as version 6.13.4.1
lal: update packaging for version 6.13.4

(cherry picked from commit 7e34daf2eff88461efbf6593d08b69cf65422024)
lalframe: debian packaging updates

(cherry picked from commit f4de88e196f69de33f08dcaaa1fd8b80f0514af0)
lalframe: sl6 packaging updates

(cherry picked from commit f47cea0afa3bcb161c46b9061952fd635a4196eb)
lalframe: drop python-2.6 package support

(cherry picked from commit 1205cc91a8d8d7df6894a68529edeaeb6da58d75)
lalframe: mark as version 1.2.4.1
lalframe: update debian packaging dependencies

(cherry picked from commit 0be1816ee986614c6be5ce3b6f8143c064e3b070)
lalframe: update packaging for version 1.2.4

(cherry picked from commit b47d7bae1232b8d6992d4f5e0f126887355b91d9)
lalmetaio: debian packaging updates

(cherry picked from commit c669da4d18ea69259e99f90ab8043d209ddaf720)
lalmetaio: sl6 packaging updates

(cherry picked from commit 906bbe2330aecd709555e1713d8598796d36fd10)
lalmetaio: drop python-2.6 package support

(cherry picked from commit 07cb24282bd209ad3dc920cb3299ed8652a34088)
lalmetaio: mark as version 1.2.5.1
lalmetaio: update debian packaging dependencies

(cherry picked from commit db017f3c46a0998f9fcd2e595998cafd309e8ee3)
lalmetaio: update packaging for version 1.2.5

(cherry picked from commit f138ffb8ac55d5808da1ea57970a468e3fac64fe)
lalxml: debian packaging updates

(cherry picked from commit 8856d19d0d9ec5f54734a04e905e462399619a5f)
lalxml: sl6 packaging updates

(cherry picked from commit 226b3eec4bc8a617dfb673dfb38a95c45b6111e3)
lalxml: drop python-2.6 package support

(cherry picked from commit 3cc9e7060c895714b5663543984c85cf0785f49f)
lalxml: mark as version 1.1.15.1